rename repo, subdir for yearly challenges
This commit is contained in:
616
2020/day19/INPUT.txt
Normal file
616
2020/day19/INPUT.txt
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@@ -0,0 +1,616 @@
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0: 8 11
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4: 92 5 | 5 5
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123: 5 3 | 92 99
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22: 103 92 | 88 5
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90: 92 70 | 5 117
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73: 24 92
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27: 92 12 | 5 109
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14: 55 5 | 4 92
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109: 5 21 | 92 78
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63: 92 91 | 5 64
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118: 92 116 | 5 49
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131: 103 92 | 111 5
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115: 46 5 | 93 92
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93: 92 89 | 5 107
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84: 92 100 | 5 57
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98: 5 40 | 92 72
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39: 5 4 | 92 21
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102: 59 5 | 131 92
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55: 92 92 | 5 92
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92: "b"
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20: 92 103 | 5 21
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110: 121 92 | 35 5
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47: 78 5 | 4 92
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48: 92 92 | 92 5
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96: 92 73 | 5 1
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106: 110 5 | 56 92
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101: 92 83 | 5 127
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105: 5 53 | 92 55
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91: 117 5 | 117 92
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60: 5 21 | 92 4
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85: 92 55 | 5 33
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103: 5 44 | 92 5
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45: 108 5 | 119 92
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82: 5 53 | 92 68
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78: 92 92 | 5 5
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58: 28 92 | 133 5
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121: 92 90 | 5 14
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16: 117 5 | 111 92
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31: 92 114 | 5 87
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112: 41 5 | 132 92
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65: 53 5 | 48 92
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19: 64 5 | 1 92
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1: 5 24 | 92 70
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77: 21 92 | 78 5
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61: 92 32 | 5 102
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52: 92 15 | 5 101
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79: 92 75 | 5 38
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64: 92 70
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99: 67 92 | 23 5
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94: 21 5 | 111 92
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30: 92 24 | 5 117
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26: 5 34 | 92 61
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126: 5 45 | 92 113
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50: 53 92 | 48 5
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83: 5 48 | 92 111
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25: 92 111 | 5 4
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49: 33 5 | 21 92
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40: 24 5 | 24 92
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124: 92 55 | 5 4
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7: 5 36 | 92 106
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62: 128 5 | 60 92
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97: 92 78 | 5 2
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69: 2 5 | 111 92
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70: 44 44
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21: 5 92 | 5 5
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117: 92 92
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116: 92 70 | 5 2
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23: 44 70
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72: 92 55 | 5 24
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87: 130 5 | 126 92
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86: 5 115 | 92 18
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36: 92 71 | 5 43
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108: 59 5 | 81 92
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80: 5 39 | 92 6
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34: 92 9 | 5 134
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119: 25 5 | 85 92
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120: 5 129 | 92 47
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10: 5 70 | 92 48
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42: 7 92 | 86 5
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125: 95 92 | 80 5
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17: 65 5 | 77 92
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43: 120 92 | 122 5
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6: 78 5 | 88 92
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81: 21 5 | 68 92
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89: 5 54 | 92 47
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35: 104 5 | 10 92
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134: 129 5 | 76 92
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66: 5 24
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122: 5 66 | 92 22
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53: 92 5
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51: 5 111 | 92 117
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68: 5 5 | 44 92
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3: 1 5 | 97 92
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56: 74 92 | 62 5
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12: 92 117 | 5 21
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57: 33 5 | 70 92
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113: 118 92 | 84 5
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104: 5 117
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5: "a"
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107: 124 92 | 90 5
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9: 16 92 | 50 5
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2: 5 5 | 92 44
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88: 44 92 | 92 5
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8: 42
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41: 5 70 | 92 4
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54: 5 4 | 92 78
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15: 92 51 | 5 105
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75: 63 92 | 112 5
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67: 4 92
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46: 98 92 | 19 5
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132: 21 5 | 24 92
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29: 94 5 | 65 92
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13: 92 88 | 5 117
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33: 5 92
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76: 92 70 | 5 53
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127: 117 5 | 55 92
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71: 29 5 | 96 92
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129: 5 111 | 92 88
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44: 5 | 92
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95: 37 92 | 105 5
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100: 53 92 | 2 5
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18: 125 5 | 58 92
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59: 5 88 | 92 24
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114: 79 92 | 26 5
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11: 42 31
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37: 88 92 | 68 5
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38: 27 5 | 17 92
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32: 40 5 | 13 92
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111: 92 5 | 5 92
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28: 92 30 | 5 109
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128: 92 2 | 5 68
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74: 92 20 | 5 82
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24: 5 5
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133: 5 100 | 92 69
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130: 92 52 | 5 123
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||||
abbbbbaabbbaababaaabaaaa
|
||||
abaaaababbabbababaaabbabababaaabbbaaaabbbbaaababbbaabaab
|
||||
abbbbaaabbaaabbbaaaababa
|
||||
ababaaaababbababbabababb
|
||||
bbbbababbaaaaababaaabbbaaabbaabaabaabaabaabbabaa
|
||||
aabaaababaababbbbaabbbaa
|
||||
abbbaaaaabbaababaabaaaabbbbbaabbaabaabbbabbbaaababbbbaabbbbabaabaabaabba
|
||||
bbbabababaabbabbbbabaaaa
|
||||
aaaaababaabaabaabbaabaabbaabbbbbbbababab
|
||||
ababaaabaababaababbbaaab
|
||||
aaabbaabbabbbabaabbaababbaaaaaaababaaabbbbbbbbabbbbaabaa
|
||||
abbabbabbaabaababbaaabab
|
||||
bbababaaabbaaababbbbbaaaabbaabbabbaababbaabbbbbbabaaabab
|
||||
bbbbaaaaabaaaaaaaabababaabbababbaaaaaabbbbbbaaaabbbabbbb
|
||||
baababbbbbbbaabbbabaaabb
|
||||
baaaaabbaaabbaabbaabbbbbbbaabbbbbbbaabbbbbbababbabbaabaabbbbbbbabaaabaabaabbaabb
|
||||
baababbbbabbaaabbabbbbaabbaaaaaabbbaaaaabbbaabaa
|
||||
baaabaabaabbbaabbabbaaaa
|
||||
aaababbbaaaaabbabbabaaab
|
||||
babaabbaababbaabaabaaabababbabbb
|
||||
abbaaaaaabbaabbbabaabbaa
|
||||
bababbababaaaabbabaabbba
|
||||
babaabaaabaaaaaaaabbbaaa
|
||||
abbabbaababaabbabbaababa
|
||||
bbaaabbbbabbababaababaabbabbaabb
|
||||
ababbbbbbaabbaabaaaaabab
|
||||
bbbaaabbbabaabaabaababba
|
||||
abbbaaaabbababaababaaaab
|
||||
bbbbbbaabbbabbaabbbaabaa
|
||||
aabaaabaabababbbbaabaaab
|
||||
bbbaababaaaabbbaabaabbbbbbabaabbbbaaabbabbabbabb
|
||||
aabbaaababaaaaaaabababba
|
||||
bbbbabbbbaabaaaaabbbbbbb
|
||||
bbbbaabaaaababbabaabbaba
|
||||
baaababbbbbbbaaabbbbbbbb
|
||||
bbbababbbbbbbaaaababaaaababaabaaabbaaabb
|
||||
abbabaaaabbaabbbaaaababbbbbaaaababaabaab
|
||||
aabaababbbbabaaabaaabbaaaabaabbbaaaababa
|
||||
babaaaaababbaababbbbaabbaabbaabb
|
||||
aabbababbabaabaabbbaaaab
|
||||
abbabbabbaaababbaaaabbab
|
||||
baaabbaabbabbbabaaabaabb
|
||||
aabbaabaaaaaabbaaaaaaabb
|
||||
bbbabaaabbbabbaabbaaabba
|
||||
bbbaaabbbbbbaabaabbaaababaaaaaaababaaaab
|
||||
abbaaababbabbbabbbabbbaabbabbbaabbaabbba
|
||||
abaaaabaababaaaaababbaba
|
||||
bababbbbbbbbabbbaabaaabbbaabbaabbababbbababaabab
|
||||
bbaaaabbaaaaabaababaabbaaaaabbbbabaabbba
|
||||
baaabbaabbbaabbbbaaaabab
|
||||
aabbbabbbbbaaabababbbbab
|
||||
baaaaabbaababbabaabaaaaa
|
||||
babbaabbbbababaaaaaaabab
|
||||
baababbbbabaaaaababbabbb
|
||||
abaaaaabaaabbabaaabbaabb
|
||||
ababbbbababbaabaabbabbaaabbabbaaaaababbabbaaabaa
|
||||
ababaabbbabaaaaabbababbb
|
||||
bbbbaabbbabbaabbbabbaaaa
|
||||
bbbbbaaaaabbabbbbbbbbaba
|
||||
bbbbabbbaababaabbbaababa
|
||||
babaaaaabbbaabbbabbabaabbbabbabbbaaabbbb
|
||||
aababbbaaabbbababababbabaabaabababbababa
|
||||
baaaabbabababaaaababbbaa
|
||||
babbaabaaaaaabbbaaabbbababbbbbba
|
||||
bbaaaabbbbbaababbbabaaaa
|
||||
aaababbbaababaababbbaaba
|
||||
baaaaaaababbbbaabbbaababbbbaabbaaaaabbaaabababaabaaaabaaaaababaa
|
||||
bbbbababababaabbbabaabbaaaabaabbbbbaabaa
|
||||
baabaabbabbbbbabbbbbbaaaabbbbabb
|
||||
bababababaabaaaaaabbaaabaababbbabbbaaaaa
|
||||
abbabaabbaababbbabaabbab
|
||||
aaaaabbbaabaaabaabbbbaaabbbaabbbbababaaaabbbbbbaaabababbaababaaa
|
||||
bbababbbbaaaabaaabbababaabaaababbabaabab
|
||||
abbbbababbaaaababaabbbab
|
||||
aabbaababababbabbababbba
|
||||
bababbbbababbaababbbabaa
|
||||
bbbaabbbaababaabbbbbaaab
|
||||
babbaaabababbaabbbabbabb
|
||||
ababbbbbbabbbbbabbbabaaaababaaabaaababbabbbabbabbabababb
|
||||
aabaaabbabaaaabbbaaaaaab
|
||||
abaaaabbabaaaabbaababbababbaabaabbaaabaa
|
||||
baaaaabbabbbaaaaaaabbbaa
|
||||
bababbaaaabbbabbbaabaaba
|
||||
bbbbaabaababbaaaaaabbbba
|
||||
bbbbaabaaabbaaabbbbabbbbababbaba
|
||||
abababbbabbaaaabaaabaabb
|
||||
baaaaabbbabbbaababbbaaab
|
||||
bbbbabaaaaaababbbaabbbab
|
||||
bbbaaabaaabaababbaababaa
|
||||
abaabababaaaabbabaaaaababababbbbbbaabbabbbbaaaaa
|
||||
abaaaaabbbbaaabaabbbbbba
|
||||
abbbbbaaaaaaaaababbbbbaaabaaaaababbbaaaaabbbaaba
|
||||
aababbaabaabbabababbbbab
|
||||
baabbaaabbbaaabaaabbbbaabbbabbabbbababababbbbabbaabaaaba
|
||||
bababbbbaaabbababaabbaabbabbabbb
|
||||
babaaabaaaababbbaaaaaaabbaaabbbaaabbabaa
|
||||
aaaababbbbbbabbbabaaaabbabbbbabb
|
||||
abbbbaaaabbbbbaaaaaababbaabbbabbbaabbaababbbabbabbbbabbaabaaabba
|
||||
abbbbbabbaabaaaabbaabbba
|
||||
aabbbaabaabaabbbbbabbbababbabbbabaabaaba
|
||||
babaaabaababbbbbbbbaabbababaababbaaababaabbbabbbbabbabba
|
||||
baabaaaabababaabbaababaa
|
||||
abaaabaabaabbabbabbaabbababbaaaa
|
||||
bbbbababaaabbbbbbabaaabb
|
||||
bbbbaabaaabaababbbaaabba
|
||||
ababbaaabaaaabbaaaaaabbaaaaaabaaaabaaabbabbbabbb
|
||||
aabbbaabaaaabbaaabbbbabababbabaa
|
||||
aababbbabaababbbbbababba
|
||||
bbbabbbbbaaaaabbbabbaaaa
|
||||
bbbbbaaaabaaabaaaababbbb
|
||||
aaababbabbabbbababaabbba
|
||||
bbabbbababbbaaaabaaaaaab
|
||||
babbbaabaaaabaaababaabbbaabbabbbbabbabbabbbbbbbb
|
||||
aaabababbbbaaaaaaaabaaba
|
||||
aababbabaaaabaaaabbaaaab
|
||||
baaabbabbbbababbaabaabbbbbabbabaaaaaaababaaababa
|
||||
bababbabbbababaabbbbbaaabbababab
|
||||
baabababbabbaabbbbaabaaa
|
||||
baaababbabbbaaaaaaabaabb
|
||||
bbbbbaabaaaababbabbbabbb
|
||||
babbababbaaaaaaabbabbababaabbaabbbbbbbbabbaabaaabbaaaaab
|
||||
abbabbaababbbbbabbaabbba
|
||||
bbbbbaabbaaaaabaabbabaaaaababbaa
|
||||
babaabbaaaaaaaabaaabaaaa
|
||||
abbbabaaabaabbbbabbaaabbababababbbababab
|
||||
bbbbabbbabbbaaaaababbabbbbbbabba
|
||||
aabbbbbbabaabbbbabbaaaabbaababaabbaaabaa
|
||||
abbbaaaabababababaabaabbbbbaabbbbabbbaabbaababaa
|
||||
abaaabaabbbababbababaaabaabbbabbabbabaab
|
||||
aababaabbaaababbbaabbaaa
|
||||
babaaaaababaaaaabaaababbbbbbbbaaabbbbbbabbaabbbaaabbaabb
|
||||
abbbabbaaabaaabaaaabbaab
|
||||
bbabbabababbaaabbababaaaaaaabbabbbabaaba
|
||||
abbbbabaaaaababbabbbbbba
|
||||
baaaaaaaabbaabbbaabaabaa
|
||||
bababbaabbbbababbbabbaab
|
||||
abbbabbabababbaaaababbbabbaababa
|
||||
baaabaabbbbabbaabaababaa
|
||||
bbbabbabaaababbbbaabaaab
|
||||
ababbaabbbabbbabaaaaabab
|
||||
bababbaabbaababbbbbababaababbbaaaaabababbbaabbbabaababbaaabaaaaaaababaaa
|
||||
abaaaaabbbbaabbbbabbaabbabaaabaabbaaaabbabaabbab
|
||||
abbbabbabaaabbabbabaaaaaaabbaaabbbbbabba
|
||||
bbaaaaaabbabbbabbbbbbbbb
|
||||
baababbbabaaaabaaaaaabbbaaaaabab
|
||||
baaaaababbababaaabbbbbba
|
||||
bbaababbabbabaaabaabbbab
|
||||
baaabbabbbbbbaabbaabbbbb
|
||||
abbaabbbbbbaaabaabbabbba
|
||||
aaaabaaaabbbbbabbababbba
|
||||
bbbbbbaaababaababbbaaaab
|
||||
baabaaaabbbbbbaaaaaaabbbbabaabbabbbababaaaaababa
|
||||
babbababaabbaabababaabab
|
||||
aaaaaaababaaaabbbaaababa
|
||||
aabaaabaabbbbaaababbabbb
|
||||
ababbabbbababababaaabbbabbbaabaa
|
||||
babaaaaabbbbabbbabbbaaaabbabbbaabbbaaaaa
|
||||
bbaaaababbbababbbbbaabbaabbababaaaaabaab
|
||||
bababbaaabbbbbaabaababaa
|
||||
aaabbabbababaaabbababaabaababaabaabbaabb
|
||||
ababbaaabbababbbbbbaabaaaabababaabbbbababaaabbbaabbbbaaaaababbba
|
||||
bbbbbbaabaabbaabaaaaaabb
|
||||
aaaabbabaaaabaabbbabbabbbbaabaaaabbaabbaaababbaa
|
||||
bbbababbbbbaabbaabaabbbb
|
||||
ababbabbbababbaaaabaabba
|
||||
babbaaabbbaaaabbabbabbba
|
||||
abaabaaabbbabaaaabbababa
|
||||
ababbbabbaaabaaaaaaabaabbabaaababbaaabbaaababbbbabbababb
|
||||
bbbabaaaabaabaaabbabbaab
|
||||
baabbabbbbaaaabbaaabbbab
|
||||
babaaaaaaaaaabbaaaabaabb
|
||||
abbabaabababbabbabbaaabaaaabbbabbbaabaab
|
||||
aaabababbabaabbababbbabbbaaababbbaababbabbbbbababbbabababababbabababaabb
|
||||
bbaaaababaaabaabbbbaaaaa
|
||||
aaabbbbbbbbbbbabababbaba
|
||||
aaababbaaababaabaaabbaab
|
||||
bbbbabbbabbbabbabbbabbba
|
||||
bbbababbabbaababababbaba
|
||||
bbbabbababbbaaaaabaaaabbbbbaabaa
|
||||
bbbbbaabababaabbbbababab
|
||||
abababbbbaabbabbabbbbabaaabaabaa
|
||||
baaabbabbababbababaabbaa
|
||||
aabbbabbbaaaaaaaaaababbbaaaababa
|
||||
bbaaabbabaabbaaabaababbaabaabbbb
|
||||
baaaaababbaaaabbbbaababbbbababbaabbaaabbbbaabbababbabbbabaabaabaaabbabba
|
||||
abbbbabaabbaabbbabbbabab
|
||||
bbbbaaaaaabababaababaabaababbaba
|
||||
bbabbbababaaaaabbbaaaaaaabbbbbba
|
||||
aaaaabbaabbbbaaaaaaaaabb
|
||||
babbbbaaaaaabaaaaabbbbaa
|
||||
bbbabababababbabbaaaaabaaaabaaaaaaaabaab
|
||||
abaaaaaaabbaabbaabababbbaabaabba
|
||||
abbabaababaabaaabbaabaab
|
||||
bbaaaabaaababaababaabbba
|
||||
abaaabaaabbaabbabaaaabbb
|
||||
bbbaabbbbbbbabaaababbbab
|
||||
ababaabbbabbbbaaabbabaaababbbaaa
|
||||
abbaaaaabbaaabbbbbaaabaa
|
||||
baabaabbbaaaabbabaaaabaa
|
||||
abaaaababbabbbbabbbabbba
|
||||
bbaababbbababababbbbaabaaabbbbbbaabbbbab
|
||||
bbbbaabababaaababbbbaaab
|
||||
abbabbaabaaabbbabaaabbbb
|
||||
bbabbaaaababbbbaabbaaabaabaabababbbabaaaabbbabab
|
||||
abababbbaababbbabbbaabba
|
||||
baaabaabababaaaabbaaabaa
|
||||
abbaaababaabbaaabababaaaaabaaaabbbabaabababbababbabbaaaabaaababbbabaabab
|
||||
bbbbabbbaabbaaabbbaabbab
|
||||
aabbabaaaabbbabbabbabbbbaabbaaaabbaabbaabaaaabbabaaabbbababbbabaaaabbbabaaaaabbabbbbaaaa
|
||||
baaaaaaababbbbaababababb
|
||||
bbbabbbbaaaabaaababbbbbb
|
||||
abbbbbaaaabbababbbbabaaaabababbbbbbaabbaaaaababaaaaaaabb
|
||||
aaabbabababababaababbbbbabaababb
|
||||
baaabbaababbabbbbbaaabab
|
||||
baababbbbbabaabbbaabbbbbbaaabbbbbbaaababaaaabaabbbbbbabbbababbabaabaabbbaaaabbba
|
||||
aaaababbbbaaabbbaaaabbab
|
||||
aabbbabbaaaaaaabaabbbbaa
|
||||
babbaabbabbbbabaaabaaaab
|
||||
bababaabbbbaaabbaabbbbba
|
||||
aababbbaabbabaaabbabbbbb
|
||||
aabaaabbaaaababbbabbbabb
|
||||
bbbaaabaabbabaaabbbbbabb
|
||||
aabbaabaababaabaaabaaabaabbbbaaabaabbbab
|
||||
ababaababaababbbaabbbaaa
|
||||
abbaaaaaabbabbabbaabaaba
|
||||
abbbbbaabaaaaabbaaaaaabb
|
||||
30
2020/day19/Makefile
Normal file
30
2020/day19/Makefile
Normal file
@@ -0,0 +1,30 @@
|
||||
INPUT := INPUT.txt
|
||||
SHELL := /bin/bash
|
||||
CFLAGS := -w -g
|
||||
#CFLAGS := -w -g -pg
|
||||
#CFLAGS := -w -O3
|
||||
TIME := \time -f "\ttime: %E real, %U user, %S sys\n\tcontext-switch:\t%c+%w, page-faults: %F+%R\n"
|
||||
export PATH := .:$(PATH)
|
||||
|
||||
.PHONY: clean all compile deploy ex1 ex2
|
||||
|
||||
all: ex1 ex2
|
||||
|
||||
output:
|
||||
@$(MAKE) --no-print-directory all 2>&1 > OUTPUT
|
||||
|
||||
compile: ex1-c ex2-c
|
||||
|
||||
ex1:
|
||||
@$(TIME) ex1.bash < $(INPUT) 2>&1
|
||||
@#$(TIME) ex1-c 2020 < $(INPUT) 2>&1
|
||||
|
||||
ex2:
|
||||
@$(TIME) ex2.bash < $(INPUT) 2>&1
|
||||
@#$(TIME) ex1-c 30000000 < $(INPUT) 2>&1
|
||||
|
||||
clean:
|
||||
@rm -f ex1-c ex2-c core
|
||||
|
||||
deploy:
|
||||
@$(MAKE) -C .. deploy
|
||||
8
2020/day19/OUTPUT
Normal file
8
2020/day19/OUTPUT
Normal file
@@ -0,0 +1,8 @@
|
||||
ex1.bash : res=285
|
||||
time: 0:00.56 real, 0.55 user, 0.00 sys
|
||||
context-switch: 12+1, page-faults: 0+5967
|
||||
|
||||
ex2.bash : res=412
|
||||
time: 0:03.37 real, 3.34 user, 0.03 sys
|
||||
context-switch: 19+1, page-faults: 0+11909
|
||||
|
||||
145
2020/day19/README
Normal file
145
2020/day19/README
Normal file
@@ -0,0 +1,145 @@
|
||||
--- Day 19: Monster Messages ---
|
||||
|
||||
You land in an airport surrounded by dense forest. As you walk to your high-speed train, the Elves at the Mythical Information Bureau contact you again. They think their satellite has collected an image of a sea monster! Unfortunately, the connection to the satellite is having problems, and many of the messages sent back from the satellite have been corrupted.
|
||||
|
||||
They sent you a list of the rules valid messages should obey and a list of received messages they've collected so far (your puzzle input).
|
||||
|
||||
The rules for valid messages (the top part of your puzzle input) are numbered and build upon each other. For example:
|
||||
|
||||
0: 1 2
|
||||
1: "a"
|
||||
2: 1 3 | 3 1
|
||||
3: "b"
|
||||
|
||||
Some rules, like 3: "b", simply match a single character (in this case, b).
|
||||
|
||||
The remaining rules list the sub-rules that must be followed; for example, the rule 0: 1 2 means that to match rule 0, the text being checked must match rule 1, and the text after the part that matched rule 1 must then match rule 2.
|
||||
|
||||
Some of the rules have multiple lists of sub-rules separated by a pipe (|). This means that at least one list of sub-rules must match. (The ones that match might be different each time the rule is encountered.) For example, the rule 2: 1 3 | 3 1 means that to match rule 2, the text being checked must match rule 1 followed by rule 3 or it must match rule 3 followed by rule 1.
|
||||
|
||||
Fortunately, there are no loops in the rules, so the list of possible matches will be finite. Since rule 1 matches a and rule 3 matches b, rule 2 matches either ab or ba. Therefore, rule 0 matches aab or aba.
|
||||
|
||||
Here's a more interesting example:
|
||||
|
||||
0: 4 1 5
|
||||
1: 2 3 | 3 2
|
||||
2: 4 4 | 5 5
|
||||
3: 4 5 | 5 4
|
||||
4: "a"
|
||||
5: "b"
|
||||
|
||||
Here, because rule 4 matches a and rule 5 matches b, rule 2 matches two letters that are the same (aa or bb), and rule 3 matches two letters that are different (ab or ba).
|
||||
|
||||
Since rule 1 matches rules 2 and 3 once each in either order, it must match two pairs of letters, one pair with matching letters and one pair with different letters. This leaves eight possibilities: aaab, aaba, bbab, bbba, abaa, abbb, baaa, or babb.
|
||||
|
||||
Rule 0, therefore, matches a (rule 4), then any of the eight options from rule 1, then b (rule 5): aaaabb, aaabab, abbabb, abbbab, aabaab, aabbbb, abaaab, or ababbb.
|
||||
|
||||
The received messages (the bottom part of your puzzle input) need to be checked against the rules so you can determine which are valid and which are corrupted. Including the rules and the messages together, this might look like:
|
||||
|
||||
0: 4 1 5
|
||||
1: 2 3 | 3 2
|
||||
2: 4 4 | 5 5
|
||||
3: 4 5 | 5 4
|
||||
4: "a"
|
||||
5: "b"
|
||||
|
||||
ababbb
|
||||
bababa
|
||||
abbbab
|
||||
aaabbb
|
||||
aaaabbb
|
||||
|
||||
Your goal is to determine the number of messages that completely match rule 0. In the above example, ababbb and abbbab match, but bababa, aaabbb, and aaaabbb do not, producing the answer 2. The whole message must match all of rule 0; there can't be extra unmatched characters in the message. (For example, aaaabbb might appear to match rule 0 above, but it has an extra unmatched b on the end.)
|
||||
|
||||
How many messages completely match rule 0?
|
||||
|
||||
Your puzzle answer was 285.
|
||||
--- Part Two ---
|
||||
|
||||
As you look over the list of messages, you realize your matching rules aren't quite right. To fix them, completely replace rules 8: 42 and 11: 42 31 with the following:
|
||||
|
||||
8: 42 | 42 8
|
||||
11: 42 31 | 42 11 31
|
||||
|
||||
This small change has a big impact: now, the rules do contain loops, and the list of messages they could hypothetically match is infinite. You'll need to determine how these changes affect which messages are valid.
|
||||
|
||||
Fortunately, many of the rules are unaffected by this change; it might help to start by looking at which rules always match the same set of values and how those rules (especially rules 42 and 31) are used by the new versions of rules 8 and 11.
|
||||
|
||||
(Remember, you only need to handle the rules you have; building a solution that could handle any hypothetical combination of rules would be significantly more difficult.)
|
||||
|
||||
For example:
|
||||
|
||||
42: 9 14 | 10 1
|
||||
9: 14 27 | 1 26
|
||||
10: 23 14 | 28 1
|
||||
1: "a"
|
||||
11: 42 31
|
||||
5: 1 14 | 15 1
|
||||
19: 14 1 | 14 14
|
||||
12: 24 14 | 19 1
|
||||
16: 15 1 | 14 14
|
||||
31: 14 17 | 1 13
|
||||
6: 14 14 | 1 14
|
||||
2: 1 24 | 14 4
|
||||
0: 8 11
|
||||
13: 14 3 | 1 12
|
||||
15: 1 | 14
|
||||
17: 14 2 | 1 7
|
||||
23: 25 1 | 22 14
|
||||
28: 16 1
|
||||
4: 1 1
|
||||
20: 14 14 | 1 15
|
||||
3: 5 14 | 16 1
|
||||
27: 1 6 | 14 18
|
||||
14: "b"
|
||||
21: 14 1 | 1 14
|
||||
25: 1 1 | 1 14
|
||||
22: 14 14
|
||||
8: 42
|
||||
26: 14 22 | 1 20
|
||||
18: 15 15
|
||||
7: 14 5 | 1 21
|
||||
24: 14 1
|
||||
|
||||
abbbbbabbbaaaababbaabbbbabababbbabbbbbbabaaaa
|
||||
bbabbbbaabaabba
|
||||
babbbbaabbbbbabbbbbbaabaaabaaa
|
||||
aaabbbbbbaaaabaababaabababbabaaabbababababaaa
|
||||
bbbbbbbaaaabbbbaaabbabaaa
|
||||
bbbababbbbaaaaaaaabbababaaababaabab
|
||||
ababaaaaaabaaab
|
||||
ababaaaaabbbaba
|
||||
baabbaaaabbaaaababbaababb
|
||||
abbbbabbbbaaaababbbbbbaaaababb
|
||||
aaaaabbaabaaaaababaa
|
||||
aaaabbaaaabbaaa
|
||||
aaaabbaabbaaaaaaabbbabbbaaabbaabaaa
|
||||
babaaabbbaaabaababbaabababaaab
|
||||
aabbbbbaabbbaaaaaabbbbbababaaaaabbaaabba
|
||||
|
||||
Without updating rules 8 and 11, these rules only match three messages: bbabbbbaabaabba, ababaaaaaabaaab, and ababaaaaabbbaba.
|
||||
|
||||
However, after updating rules 8 and 11, a total of 12 messages match:
|
||||
|
||||
bbabbbbaabaabba
|
||||
babbbbaabbbbbabbbbbbaabaaabaaa
|
||||
aaabbbbbbaaaabaababaabababbabaaabbababababaaa
|
||||
bbbbbbbaaaabbbbaaabbabaaa
|
||||
bbbababbbbaaaaaaaabbababaaababaabab
|
||||
ababaaaaaabaaab
|
||||
ababaaaaabbbaba
|
||||
baabbaaaabbaaaababbaababb
|
||||
abbbbabbbbaaaababbbbbbaaaababb
|
||||
aaaaabbaabaaaaababaa
|
||||
aaaabbaabbaaaaaaabbbabbbaaabbaabaaa
|
||||
aabbbbbaabbbaaaaaabbbbbababaaaaabbaaabba
|
||||
|
||||
After updating rules 8 and 11, how many messages completely match rule 0?
|
||||
|
||||
Your puzzle answer was 412.
|
||||
|
||||
Both parts of this puzzle are complete! They provide two gold stars: **
|
||||
|
||||
At this point, you should return to your Advent calendar and try another puzzle.
|
||||
|
||||
If you still want to see it, you can get your puzzle input.
|
||||
12
2020/day19/TEST.txt
Normal file
12
2020/day19/TEST.txt
Normal file
@@ -0,0 +1,12 @@
|
||||
0: 4 1 5
|
||||
1: 2 3 | 3 2
|
||||
2: 4 4 | 5 5
|
||||
3: 4 5 | 5 4
|
||||
4: "a"
|
||||
5: "b"
|
||||
|
||||
ababbb
|
||||
bababa
|
||||
abbbab
|
||||
aaabbb
|
||||
aaaabbb
|
||||
47
2020/day19/TEST2.txt
Normal file
47
2020/day19/TEST2.txt
Normal file
@@ -0,0 +1,47 @@
|
||||
42: 9 14 | 10 1
|
||||
9: 14 27 | 1 26
|
||||
10: 23 14 | 28 1
|
||||
1: "a"
|
||||
11: 42 31
|
||||
5: 1 14 | 15 1
|
||||
19: 14 1 | 14 14
|
||||
12: 24 14 | 19 1
|
||||
16: 15 1 | 14 14
|
||||
31: 14 17 | 1 13
|
||||
6: 14 14 | 1 14
|
||||
2: 1 24 | 14 4
|
||||
0: 8 11
|
||||
13: 14 3 | 1 12
|
||||
15: 1 | 14
|
||||
17: 14 2 | 1 7
|
||||
23: 25 1 | 22 14
|
||||
28: 16 1
|
||||
4: 1 1
|
||||
20: 14 14 | 1 15
|
||||
3: 5 14 | 16 1
|
||||
27: 1 6 | 14 18
|
||||
14: "b"
|
||||
21: 14 1 | 1 14
|
||||
25: 1 1 | 1 14
|
||||
22: 14 14
|
||||
8: 42
|
||||
26: 14 22 | 1 20
|
||||
18: 15 15
|
||||
7: 14 5 | 1 21
|
||||
24: 14 1
|
||||
|
||||
abbbbbabbbaaaababbaabbbbabababbbabbbbbbabaaaa
|
||||
bbabbbbaabaabba
|
||||
babbbbaabbbbbabbbbbbaabaaabaaa
|
||||
aaabbbbbbaaaabaababaabababbabaaabbababababaaa
|
||||
bbbbbbbaaaabbbbaaabbabaaa
|
||||
bbbababbbbaaaaaaaabbababaaababaabab
|
||||
ababaaaaaabaaab
|
||||
ababaaaaabbbaba
|
||||
baabbaaaabbaaaababbaababb
|
||||
abbbbabbbbaaaababbbbbbaaaababb
|
||||
aaaaabbaabaaaaababaa
|
||||
aaaabbaaaabbaaa
|
||||
aaaabbaabbaaaaaaabbbabbbaaabbaabaaa
|
||||
babaaabbbaaabaababbaabababaaab
|
||||
aabbbbbaabbbaaaaaabbbbbababaaaaabbaaabba
|
||||
203
2020/day19/ex1-c.c
Normal file
203
2020/day19/ex1-c.c
Normal file
@@ -0,0 +1,203 @@
|
||||
/* ex1-c: Advent2020 game, day 18/tasks 1 & 2
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
|
||||
#define T_LPAR (-'(')
|
||||
#define T_RPAR (-')')
|
||||
|
||||
#define T_PLUS (-'+')
|
||||
#define T_MULT (-'*')
|
||||
|
||||
#define T_ERR (-'E')
|
||||
#define T_OK (-'O')
|
||||
#define T_END (-'$')
|
||||
|
||||
#define LEN_MAX 1024
|
||||
|
||||
#define NPUSH(n) (push(&nstack, (n)))
|
||||
#define OPUSH(o) (push(&ostack, (o)))
|
||||
|
||||
#define NPOP() (pop(&nstack))
|
||||
#define OPOP() (pop(&ostack))
|
||||
|
||||
#define NTOP() (top(&nstack))
|
||||
#define OTOP() (top(&ostack))
|
||||
|
||||
#define OEMPTY() (empty(&ostack))
|
||||
|
||||
#define DIGIT(c) (((c) >= '0') && ((c) <= '9'))
|
||||
|
||||
static struct stack {
|
||||
int last;
|
||||
long elt[LEN_MAX];
|
||||
} nstack, ostack;
|
||||
|
||||
static char *saveptr=NULL;
|
||||
|
||||
static int prio_1(long op)
|
||||
{
|
||||
return op==T_PLUS || op==T_MULT? 1: 0;
|
||||
}
|
||||
static int prio_2(long op)
|
||||
{
|
||||
return op==T_PLUS? 2: op==T_MULT? 1: 0;
|
||||
}
|
||||
static int (*prio)()=&prio_1;
|
||||
|
||||
static long push(struct stack *s, long val)
|
||||
{
|
||||
s->elt[s->last++]=val;
|
||||
return val;
|
||||
}
|
||||
static long pop(struct stack *s)
|
||||
{
|
||||
return s->elt[--s->last];
|
||||
}
|
||||
static long top(struct stack *s)
|
||||
{
|
||||
return s->elt[s->last-1];
|
||||
}
|
||||
static long empty(struct stack *s)
|
||||
{
|
||||
return s->last==0;
|
||||
}
|
||||
|
||||
static void print() {
|
||||
int i;
|
||||
printf("NSTACK: ");
|
||||
for (i=0; i<nstack.last; ++i) {
|
||||
printf("%ld ", nstack.elt[i]);
|
||||
}
|
||||
printf("\nOSTACK: ");
|
||||
for (i=0; i<ostack.last; ++i) {
|
||||
printf("%c ", (char) -ostack.elt[i]);
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
static long get_tok()
|
||||
{
|
||||
char *p, c;
|
||||
long val=0;
|
||||
|
||||
p=saveptr;
|
||||
while (!val) {
|
||||
c=*p;
|
||||
switch (c) {
|
||||
case ' ':
|
||||
break;
|
||||
case '(':
|
||||
case ')':
|
||||
case '*':
|
||||
case '+':
|
||||
val=-c;
|
||||
break;
|
||||
case '\n':
|
||||
case '\0':
|
||||
val=T_END;
|
||||
break;
|
||||
default:
|
||||
if (! DIGIT(c)) {
|
||||
val=T_ERR;
|
||||
break;
|
||||
}
|
||||
while (DIGIT(c)) {
|
||||
val=(val*10 + c - '0');
|
||||
p++;
|
||||
c=*p;
|
||||
}
|
||||
p--;
|
||||
break;
|
||||
}
|
||||
p++;
|
||||
}
|
||||
saveptr=p;
|
||||
return val;
|
||||
}
|
||||
|
||||
static long eval_top()
|
||||
{
|
||||
long val2 = NPOP();
|
||||
long val1 = NPOP();
|
||||
char op = OPOP();
|
||||
NPUSH(op==T_PLUS? val1+val2: val1*val2);
|
||||
return NTOP();
|
||||
}
|
||||
|
||||
static long eval_expr()
|
||||
{
|
||||
long res=T_LPAR;
|
||||
|
||||
res=get_tok();
|
||||
while (res!=T_ERR && res!=T_END) {
|
||||
switch (res) {
|
||||
case T_LPAR:
|
||||
OPUSH(res);
|
||||
break;
|
||||
case T_RPAR:
|
||||
while(!OEMPTY() && OTOP() != T_LPAR)
|
||||
eval_top();
|
||||
if(!OEMPTY()) // remove '('
|
||||
OPOP();
|
||||
break;
|
||||
case T_PLUS:
|
||||
case T_MULT:
|
||||
|
||||
while (!OEMPTY() && (*prio)(OTOP()) >= (*prio)(res))
|
||||
eval_top();
|
||||
OPUSH(res);
|
||||
break;
|
||||
|
||||
default:
|
||||
NPUSH(res);
|
||||
break;
|
||||
}
|
||||
res=get_tok();
|
||||
//print();
|
||||
}
|
||||
while(!OEMPTY())
|
||||
eval_top();
|
||||
|
||||
// return NSTACK's top
|
||||
//printf("Returning %ld\n", NTOP());
|
||||
return NPOP();
|
||||
//end:
|
||||
// return left;
|
||||
}
|
||||
|
||||
int main(ac, av)
|
||||
int ac;
|
||||
char **av;
|
||||
{
|
||||
char line[1024];
|
||||
long res=0, tmp;
|
||||
|
||||
if (ac != 2) {
|
||||
fprintf(stderr, "usage: %s [1|2]\n", *av);
|
||||
exit (1);
|
||||
}
|
||||
if (**(av+1) == '2')
|
||||
prio=&prio_2;
|
||||
|
||||
while (fgets(line, sizeof line, stdin)) {
|
||||
//gets(line, sizeof line, stdin);
|
||||
//NPUSH(10);
|
||||
//NPUSH(100);
|
||||
//NPUSH(1000);
|
||||
//print();
|
||||
//printf("TOP=%ld\n", NTOP());
|
||||
//NPOP();
|
||||
//print();
|
||||
|
||||
saveptr=line;
|
||||
//printf("%s", line);
|
||||
tmp=eval_expr();
|
||||
//printf("%s : res=%ld\n", line, tmp);
|
||||
res+=tmp;
|
||||
}
|
||||
printf("%s : res=%ld\n", *av, res);
|
||||
exit (0);
|
||||
}
|
||||
68
2020/day19/ex1.bash
Executable file
68
2020/day19/ex1.bash
Executable file
@@ -0,0 +1,68 @@
|
||||
#!/bin/bash
|
||||
#
|
||||
# ex1.bash: Advent2020 game, day 19/game 1.
|
||||
|
||||
CMD=${0##*/}
|
||||
set -o noglob
|
||||
shopt -s extglob
|
||||
|
||||
declare -a RULE=() MATCH=() STRING=()
|
||||
# shellcheck disable=SC2034
|
||||
declare var_0
|
||||
declare -i res=0
|
||||
|
||||
# build a regexp use-able by bash =~ operator.
|
||||
# Recursively replace rules, until we get final text values.
|
||||
# To avoid running subshell, we must create local variables w/ different
|
||||
# names at each recursion level (to avoid "circular name reference" error).
|
||||
function buildtree {
|
||||
local -i prof="$1" # to allow ≠ local names
|
||||
local -n upname="$2" # caller variable name
|
||||
local name="var_$prof" # local var name, w/ depth
|
||||
eval "local $name" # ... declared here
|
||||
shift 2
|
||||
local args=$* res="" arg t
|
||||
|
||||
for arg in $args; do
|
||||
if [[ -z "${arg/[|ab]}" ]]; then
|
||||
res+="$arg"
|
||||
else
|
||||
if [[ ! -v MATCH[$arg] ]]; then
|
||||
buildtree "$((prof+1))" "$name" "${RULE[$arg]}"
|
||||
t="${!name}"
|
||||
#[[ ! "$t" =~ ^.$ ]] && t="($t)"
|
||||
if [[ ! "$t" =~ ^[ab]+$ ]] && [[ "${t:0:1}${t: -1}" != "()" ]]; then
|
||||
t="($t)"
|
||||
fi
|
||||
MATCH[$arg]="$t"
|
||||
fi
|
||||
res+=${MATCH[$arg]}
|
||||
fi
|
||||
done
|
||||
# shellcheck disable=SC2034
|
||||
upname="$res"
|
||||
}
|
||||
|
||||
while read -r line; do
|
||||
case ${line:0:1} in
|
||||
[0-9]*) # rule
|
||||
rule=${line%:*}
|
||||
val=${line#*: }
|
||||
RULE[$rule]="${val//\"}"
|
||||
;;
|
||||
[a-z]*) # string
|
||||
STRING+=("$line")
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
buildtree 1 var_0 0
|
||||
#printf "RULE ZERO = %s\n" "${MATCH[0]}"
|
||||
|
||||
for str in "${STRING[@]}"; do
|
||||
[[ "$str" =~ ^${MATCH[0]}$ ]] && ((res++))
|
||||
done
|
||||
|
||||
printf "%s : res=%d\n" "$CMD" "$res"
|
||||
|
||||
exit 0
|
||||
91
2020/day19/ex2.bash
Executable file
91
2020/day19/ex2.bash
Executable file
@@ -0,0 +1,91 @@
|
||||
#!/bin/bash
|
||||
#
|
||||
# ex2.bash: Advent2020 game, day 19/game 2.
|
||||
|
||||
CMD=${0##*/}
|
||||
set -o noglob
|
||||
shopt -s extglob
|
||||
|
||||
declare -a RULE=() MATCH=() STRING=()
|
||||
# shellcheck disable=SC2034
|
||||
declare var_0 rule8 rule11
|
||||
declare -i res=0
|
||||
|
||||
# build a regexp use-able by bash =~ operator.
|
||||
# Recursively replace rules, until we get final text values.
|
||||
# To avoid running subshell, we must create local variables w/ different
|
||||
# names at each recursion level (to avoid "circular name reference" error).
|
||||
function buildtree {
|
||||
local -i prof="$1" # to allow ≠ local names
|
||||
local -n upname="$2" # caller variable name
|
||||
local name="var_$prof" # local var name, w/ depth
|
||||
eval "local $name" # ... declared here
|
||||
shift 2
|
||||
local args=$* res="" arg t
|
||||
|
||||
for arg in $args; do
|
||||
if [[ -z "${arg/[|ab]}" ]]; then
|
||||
res+="$arg"
|
||||
else
|
||||
if [[ ! -v MATCH[$arg] ]]; then
|
||||
buildtree "$((prof+1))" "$name" "${RULE[$arg]}"
|
||||
t="${!name}"
|
||||
if [[ ! "$t" =~ ^[ab]+$ ]] && [[ "${t:0:1}${t: -1}" != "()" ]]; then
|
||||
t="($t)"
|
||||
fi
|
||||
MATCH[$arg]="$t"
|
||||
fi
|
||||
res+=${MATCH[$arg]}
|
||||
fi
|
||||
done
|
||||
# shellcheck disable=SC2034
|
||||
upname="$res"
|
||||
}
|
||||
|
||||
while read -r line; do
|
||||
case ${line:0:1} in
|
||||
[0-9]*) # rule
|
||||
rule=${line%:*}
|
||||
val=${line#*: }
|
||||
RULE[$rule]="${val//\"}"
|
||||
;;
|
||||
[a-z]*) # string
|
||||
STRING+=("$line")
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
# Old rules:
|
||||
# 8: 42
|
||||
# 11: 42 31
|
||||
# New rules:
|
||||
# 8: 42 | 42 8
|
||||
# --> (${M[42]}+)
|
||||
# 11: 42 31 | 42 11 31
|
||||
# --> (${M[42]}${M[31]} | ${M[42]}${M[42]}${M[31]}${M[31]} etc...
|
||||
# --> (OR (${M[42]}{n})${M[31]}{n})), with 1 <= n <= SOME_LIMIT
|
||||
|
||||
|
||||
# hack:
|
||||
# 1) build rules 42 and 31
|
||||
# 2) calculate rule 8 and 11 with some "guessed" minimum possible value
|
||||
# 3) build rule 0
|
||||
|
||||
# result is "stable" from this value
|
||||
SOME_LIMIT=5
|
||||
|
||||
buildtree 1 var_0 42
|
||||
buildtree 1 var_0 31
|
||||
rule8="${MATCH[42]}+"
|
||||
rule11="${MATCH[42]}${MATCH[31]}"
|
||||
for ((i=2; i<SOME_LIMIT; ++i)); do
|
||||
rule11+="|${MATCH[42]}{$i}${MATCH[31]}{$i}"
|
||||
done
|
||||
MATCH[8]="$rule8"
|
||||
MATCH[11]="($rule11)"
|
||||
buildtree 1 var_0 0
|
||||
for str in "${STRING[@]}"; do
|
||||
[[ "$str" =~ ^${MATCH[0]}$ ]] && ((res++))
|
||||
done
|
||||
|
||||
printf "%s : res=%d\n" "$CMD" "$res"
|
||||
Reference in New Issue
Block a user