n=270;
grades=[|79,51,81|
97,83,71|
95,51,30|
95,35,49|
43,34,68|
68,58,30|
93,40,98|
32,34,67|
59,57,54|
33,44,81|
52,36,54|
83,85,82|
77,56,90|
91,92,94|
44,77,55|
63,77,90|
50,60,42|
69,64,36|
92,98,78|
89,58,67|
66,77,76|
44,32,83|
85,42,78|
63,80,31|
31,79,83|
39,50,99|
34,73,48|
42,98,32|
79,45,63|
68,63,92|
68,78,94|
92,72,57|
59,40,30|
55,83,93|
76,72,54|
50,86,37|
77,93,88|
61,44,54|
64,55,41|
96,41,37|
49,84,64|
69,93,49|
45,92,79|
51,65,91|
55,49,52|
66,53,95|
69,41,42|
67,52,75|
65,32,78|
95,35,97|
38,59,41|
72,41,68|
61,40,87|
39,88,72|
61,62,64|
85,51,40|
37,66,78|
71,37,43|
81,85,79|
90,97,90|
49,98,61|
63,52,99|
96,91,42|
92,68,88|
97,96,58|
75,87,79|
40,40,95|
61,46,64|
59,50,46|
81,64,99|
34,35,48|
84,38,70|
38,37,69|
66,57,90|
65,98,53|
80,56,81|
78,48,50|
60,48,74|
76,82,79|
43,89,71|
81,37,42|
48,43,38|
30,51,34|
76,42,48|
32,65,78|
89,57,94|
81,88,34|
84,35,47|
78,68,86|
32,49,55|
66,85,61|
60,93,93|
90,88,95|
66,89,91|
56,74,79|
48,99,98|
80,30,49|
85,71,71|
83,36,98|
42,98,83|
32,47,36|
31,84,79|
47,49,82|
83,71,54|
50,65,38|
98,75,72|
45,46,34|
99,44,48|
68,34,63|
80,30,34|
87,43,70|
55,53,48|
33,46,71|
58,98,86|
71,46,57|
89,84,57|
84,33,35|
79,53,61|
38,78,94|
70,52,45|
91,47,60|
49,39,45|
93,83,83|
87,83,38|
52,89,61|
90,48,80|
40,86,76|
40,43,86|
70,60,31|
50,50,70|
47,94,85|
53,50,89|
72,57,57|
34,67,86|
97,32,46|
89,71,46|
46,63,59|
89,68,63|
36,44,30|
69,55,33|
95,65,38|
61,38,59|
51,60,68|
62,47,99|
40,34,87|
65,84,84|
53,71,82|
99,43,30|
50,74,43|
91,99,99|
95,81,83|
91,81,79|
58,41,84|
58,42,34|
90,74,70|
30,54,81|
80,75,95|
64,59,78|
62,66,61|
48,88,32|
34,56,98|
94,55,42|
84,92,53|
82,57,92|
53,88,67|
57,93,70|
30,76,62|
63,65,83|
31,66,75|
57,43,32|
49,46,93|
95,39,96|
97,99,88|
62,83,91|
50,85,69|
62,61,94|
57,46,73|
30,35,54|
37,65,62|
97,69,59|
57,74,74|
48,54,57|
61,94,61|
91,59,41|
77,86,98|
85,32,76|
80,40,63|
99,60,49|
48,54,79|
38,88,30|
60,44,67|
87,99,44|
56,31,55|
82,55,63|
94,33,47|
51,56,56|
71,44,53|
53,78,56|
36,84,57|
73,39,49|
55,45,91|
36,85,53|
51,59,41|
72,81,39|
93,58,76|
58,85,77|
87,85,79|
88,46,96|
86,61,77|
70,65,52|
42,94,62|
75,96,46|
99,98,59|
70,30,65|
87,65,96|
54,90,88|
83,83,34|
35,67,56|
45,86,78|
86,74,67|
50,74,65|
51,76,94|
35,68,72|
70,40,71|
56,68,51|
39,99,32|
75,45,86|
94,45,32|
92,77,31|
97,56,70|
89,49,35|
85,78,94|
77,39,37|
82,82,99|
39,77,90|
40,47,32|
45,42,33|
79,78,34|
91,49,45|
72,49,84|
34,59,71|
45,91,34|
46,69,55|
30,51,51|
45,36,98|
52,49,45|
40,31,60|
69,30,81|
55,73,97|
42,74,34|
67,91,38|
66,67,70|
53,79,65|
53,81,77|
52,66,62|
87,42,50|
67,44,90|
77,40,99|
54,30,95|
68,90,92|
94,99,45|
43,32,72|
85,52,83|
33,86,69|
98,94,45|
59,70,38|
38,76,81|
38,79,56|
63,50,89|
68,73,54|];