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100
5 8
1 2
1 3
1 4
1 5
2 1
3 1
4 1
5 1
5 10
1 3
1 4
2 3
2 5
3 1
3 4
3 5
4 2
5 1
5 3
5 10
1 4
2 3
2 5
3 1
3 5
4 2
4 3
4 5
5 1
5 2
3 6
1 2
1 3
2 1
2 3
3 1
3 2
5 10
1 2
1 5
2 3
2 4
3 1
4 3
4 5
5 2
5 3
5 4
4 10
1 2
1 3
1 4
2 1
2 3
2 4
3 1
3 4
4 2
4 3
5 10
1 2
1 3
2 1
2 4
3 1
3 5
4 2
4 5
5 3
5 4
5 10
1 ...

Case #1: IMPOSSIBLE
Case #2: IMPOSSIBLE
Case #3: IMPOSSIBLE
Case #4: IMPOSSIBLE
Case #5: IMPOSSIBLE
Case #6: IMPOSSIBLE
Case #7: IMPOSSIBLE
Case #8: IMPOSSIBLE
Case #9: IMPOSSIBLE
Case #10: IMPOSSIBLE
Case #11: IMPOSSIBLE
Case #12: IMPOSSIBLE
Case #13: IMPOSSIBLE
Case #14: IMPOSSIBLE
Case #15: IMPOS...

wrong answer you didn't find a solution but jury did (test case 2)

100
199 4980
1 95
1 96
1 105
1 124
1 130
1 131
1 135
1 137
1 139
1 140
1 141
1 147
1 155
1 172
1 174
1 179
1 183
1 188
1 193
1 196
1 197
2 3
2 5
2 13
2 14
2 17
2 20
2 24
2 26
2 30
2 41
2 44
2 45
2 52
2 56
2 67
2 70
2 71
2 74
2 78
2 84
2 85
2 90
2 92
2 93
2 97
2 107
2 111
2 113
2 122
2 124
2 128
2 13...

Case #1: IMPOSSIBLE
Case #2: IMPOSSIBLE
Case #3: IMPOSSIBLE
Case #4: IMPOSSIBLE
Case #5: IMPOSSIBLE
Case #6: IMPOSSIBLE
Case #7: IMPOSSIBLE
Case #8: IMPOSSIBLE
Case #9: IMPOSSIBLE
Case #10: IMPOSSIBLE
Case #11: IMPOSSIBLE
Case #12: IMPOSSIBLE
Case #13: IMPOSSIBLE
Case #14: IMPOSSIBLE
Case #15: IMPOS...

wrong answer you didn't find a solution but jury did (test case 3)