ex1.bash : res=21996
	time: 0:00.19 real, 0.15 user, 0.04 sys
	context-switch:	26+98, page-faults: 0+9522

ex1-c : res=21996
	time: 0:00.00 real, 0.00 user, 0.00 sys
	context-switch:	0+1, page-faults: 0+75

ex2.bash : res=650080463519
	time: 0:06.63 real, 6.59 user, 0.04 sys
	context-switch:	666+92, page-faults: 0+10157