n=180;
grades=[|79,91,82|
75,94,52|
82,46,88|
43,49,45|
62,89,82|
49,57,48|
61,69,75|
47,92,38|
86,68,81|
98,96,98|
50,79,75|
46,99,67|
94,30,79|
36,85,74|
51,97,69|
76,65,72|
86,42,32|
48,73,88|
78,85,55|
35,89,64|
56,95,38|
85,90,68|
30,37,76|
91,84,68|
35,77,83|
89,40,48|
43,57,34|
98,82,46|
77,43,99|
65,33,63|
79,83,88|
82,72,88|
68,62,39|
77,69,30|
31,80,71|
92,43,57|
96,80,82|
36,30,57|
78,65,39|
80,90,53|
91,90,42|
64,50,82|
42,81,44|
83,45,95|
98,97,97|
84,38,64|
74,66,97|
80,65,62|
88,39,36|
82,49,61|
61,32,61|
58,47,43|
67,73,83|
72,65,51|
54,71,59|
75,97,48|
71,51,46|
52,85,99|
65,96,30|
53,77,80|
77,44,91|
46,37,81|
41,71,96|
96,38,62|
50,65,56|
82,68,52|
48,84,62|
73,53,80|
56,42,40|
63,51,55|
31,70,84|
72,98,55|
34,99,87|
96,78,71|
64,51,99|
52,64,30|
58,79,83|
86,60,69|
77,82,94|
98,67,91|
63,49,45|
52,95,93|
56,87,52|
56,97,59|
68,67,46|
55,42,50|
45,97,59|
83,83,77|
88,55,94|
80,81,73|
46,84,93|
41,49,41|
74,86,36|
86,70,36|
40,63,58|
49,35,74|
33,33,32|
67,42,31|
99,62,79|
48,74,44|
54,92,43|
70,75,39|
37,77,69|
72,69,50|
40,58,94|
86,54,88|
41,95,65|
44,49,90|
58,65,70|
31,77,64|
47,36,56|
35,83,61|
57,53,66|
74,65,37|
72,31,32|
70,76,61|
73,85,36|
88,34,60|
44,59,99|
85,34,99|
35,55,40|
65,76,30|
79,56,64|
95,45,40|
61,74,62|
67,91,94|
81,78,71|
46,84,76|
93,59,31|
95,99,98|
57,87,91|
44,72,92|
39,33,43|
37,97,41|
89,71,65|
35,84,40|
99,84,52|
35,85,84|
74,71,91|
91,85,58|
73,79,93|
78,80,56|
86,95,95|
35,85,40|
64,46,95|
74,98,87|
71,97,52|
67,70,63|
96,71,58|
65,63,69|
64,41,46|
39,54,72|
92,47,87|
76,53,67|
63,86,57|
60,93,42|
50,85,57|
90,64,70|
68,31,91|
55,51,39|
89,50,30|
82,54,97|
92,52,52|
47,76,52|
83,56,76|
43,75,34|
38,62,33|
63,31,63|
84,53,41|
38,74,52|
93,95,88|
89,41,33|
74,59,36|
57,73,88|
44,63,86|
35,37,40|
92,61,87|
99,30,88|
81,49,37|
50,49,63|];