n=40;
m=50;
X=[40,1,33,4,14,39,5,22,39,13,40,17,26,6,33,35,3,27,14,21,22,6,31,29,8,16,25,29,6,35,12,26,28,40,22,30,7,34,38,6,36,9,2,29,39,25,1,39,12,16];