2021/round1/blockchain_sample_input.txt

5
2
1 2 3
3
1 2 4
3 2 5
4
2 1 10
3 1 1
4 1 5
5
1 2 1
2 3 1
3 4 1
4 5 1
8
4 6 2
2 7 1
5 1 2
1 4 3
8 5 4
2 4 3
3 1 1