m=12;
n=12;
students=[|0,70,33,63,29,99,58,94,52,13,35,99|
46,57,71,23,17,3,94,48,77,18,83,11|
83,25,59,62,2,78,86,7,94,65,80,32|
39,84,60,65,72,61,58,84,8,72,12,19|
47,49,49,59,71,52,34,22,21,20,92,33|
80,39,74,9,28,97,100,93,29,25,4,66|
79,81,98,21,91,62,82,4,59,100,34,1|
51,80,92,69,77,39,38,97,51,34,35,19|
22,1,67,9,90,31,82,11,51,84,78,70|
74,42,100,88,53,80,57,62,32,51,48,63|
92,46,4,61,31,98,69,52,88,20,68,41|
48,79,97,98,56,44,73,3,63,100,87,0|];