m=30;
n=30;
students=[|0,69,14,26,59,77,73,8,21,72,1,74,76,51,94,44,24,98,71,77,59,9,12,49,38,72,22,55,35,61|
16,48,41,21,67,74,92,4,7,85,34,92,39,96,42,26,1,1,4,64,33,96,62,23,67,76,26,47,32,73|
82,30,14,61,21,92,40,4,2,38,76,64,8,14,3,49,71,31,38,86,98,17,15,98,32,55,69,46,61,3|
44,67,50,44,76,0,45,23,25,11,82,99,11,39,50,40,21,52,17,60,44,90,44,6,16,38,3,41,43,56|
26,24,0,9,90,36,50,13,42,88,87,66,32,28,73,94,52,11,35,47,9,87,37,57,15,56,38,95,6,43|
23,30,84,39,88,69,5,34,81,93,86,2,77,10,28,30,97,68,14,12,88,1,100,35,73,30,2,43,11,41|
58,82,6,84,71,16,18,67,41,100,92,78,57,7,35,69,56,76,13,93,26,26,38,21,96,7,88,2,60,17|
54,95,26,2,0,21,87,11,96,36,83,88,31,24,24,62,14,88,84,39,22,17,84,96,1,78,91,53,9,35|
75,87,100,33,80,42,7,20,50,65,81,92,14,45,96,34,6,20,86,51,4,19,70,91,13,0,42,70,43,15|
47,14,96,72,41,91,11,72,7,92,12,16,51,13,86,40,50,43,55,26,7,1,70,18,71,99,49,55,94,78|
40,59,20,96,34,6,28,85,42,70,62,63,32,34,97,80,49,47,50,73,85,63,20,29,0,19,91,84,58,55|
33,4,68,55,12,38,49,9,13,99,4,35,26,5,42,29,98,20,95,77,36,63,41,42,45,81,40,53,60,5|
55,9,13,34,6,52,28,35,33,29,21,67,57,61,21,41,95,54,50,19,81,75,67,73,77,47,40,83,16,28|
3,13,15,87,30,22,39,49,42,52,83,100,7,67,27,30,62,47,76,4,19,13,25,78,55,4,21,48,42,59|
59,47,26,47,92,67,49,2,27,67,76,44,44,23,69,83,100,64,44,95,63,46,17,77,81,16,77,80,78,10|
26,42,19,5,58,62,42,59,85,77,4,87,89,70,38,3,35,10,8,87,42,67,37,2,58,55,2,56,6,94|
71,46,45,35,35,30,76,73,15,15,7,0,73,14,51,91,5,58,52,27,78,32,68,98,13,39,71,85,40,40|
36,17,28,80,79,76,53,90,26,73,7,71,61,25,3,46,97,71,64,76,21,22,25,97,27,7,70,92,99,2|
42,75,56,66,71,61,10,86,79,52,46,81,5,5,76,98,81,72,55,66,91,15,62,92,69,13,79,91,15,98|
88,96,86,33,34,89,22,89,36,10,68,10,56,39,100,84,55,76,26,15,76,0,0,79,35,31,64,91,88,74|
8,34,28,19,70,93,4,19,41,40,42,7,66,51,55,76,16,70,3,56,64,95,64,93,52,97,21,72,82,47|
57,2,57,7,96,54,66,8,67,72,90,53,43,73,53,95,77,49,87,41,86,15,55,17,72,50,54,68,13,72|
2,63,41,53,0,82,98,4,0,30,29,3,64,20,98,37,82,22,83,11,28,60,22,44,61,74,78,6,62,51|
35,14,92,38,18,18,96,91,14,14,39,98,82,2,79,63,80,91,16,71,82,40,12,75,94,67,38,98,50,20|
65,4,55,61,26,40,15,96,22,68,26,36,15,44,61,31,70,4,23,0,3,49,48,94,54,6,96,36,42,63|
28,76,15,25,28,58,52,84,13,69,20,19,30,63,66,25,31,14,77,35,5,32,1,78,97,43,2,58,11,73|
56,78,99,91,40,0,10,4,100,18,14,85,20,76,66,56,62,57,35,79,43,61,32,60,41,37,32,63,13,76|
98,76,88,41,16,45,29,55,32,50,96,31,58,92,43,71,4,55,3,22,7,54,91,2,100,84,18,32,73,64|
45,78,22,86,58,46,28,19,6,60,80,15,65,12,65,86,73,94,4,85,90,67,95,17,44,49,16,27,58,15|
97,83,78,41,91,7,13,20,18,85,56,55,87,87,31,77,47,63,55,18,81,35,0,14,5,46,34,94,7,0|];