n=57;
m=81;
A=[68,38,15,47,80,76,57,53,18,14,51,64,54,79,14,26,45,61,39,66,2,6,29,4,79,51,77,44,13,76,79,36,28,25,54,64,48,30,52,44,35,38,79,55,54,4,59,2,22,45,9,24,78,19,67,58,71];