N=100;
M=86;
init_finger=[49,16,46,63,77,14,53,34,27,51,100,66,8,20,42,90,98,94,11,57,12,54,48,97,64,91,99,87,41,56,85,65,81,31,38,10,69,52,78,89,22,88,23,4,40,61,58,60,70,28,37,36,18,47,68,15,96,55,44,93,35,32,72,82,86,71,39,9,62,45,43,29,24,67,79,5,84,73,26,3,7,17,21,74,50,19,33,30,75,25,95,6,92,83,2,1,80,76,59,13];