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