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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: 51
1 4 2 5 3 1 4 2 3 5 1 4 2 3 5 1 4 2 3 5 1 3 4 2 5 1 4 2 5 3 1 4 2 5 3 1 4 2 3 5 1 4 2 5 3 1 3 4 2 5 1 
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...

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

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: 1000001
1 67 142 75 191 179 161 23 100 22 40 99 82 68 129 90 113 27 160 88 172 52 57 110 86 194 62 49 143 192 181 156 174 35 123 58 152 133 137 108 6 186 105 36 157 38 8 2 148 4 39 43 195 29 154 73 41 115 72 176 190 30 45 101 171 112 121 117 141 187 8...

wrong answer you didn't find a solution but jury did (test case 5)