n = 20;
m = 10;
a = [|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|1,0,0,0,0,0,0,0,0,0|0,0,0,1,0,0,0,0,0,0|0,1,0,1,1,0,0,0,0,0|0,0,1,0,0,0,0,1,0,0|1,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,1,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|1,0,0,0,0,0,0,0,0,0|1,1,0,0,0,0,0,0,0,0|0,0,0,0,0,0,0,0,0,0|0,0,1,0,0,0,0,0,0,0|1,0,0,0,0,0,0,0,1,0|0,0,0,0,0,0,0,0,0,0|];