5 15
1 1 0.0
1 2 -1.2152939216468015
1 3 0.0
1 4 0.0
1 5 0.0
2 2 0.0
2 3 -0.7574124842740728
2 4 0.0
2 5 0.0
3 3 0.0
3 4 -0.19544726165712148
3 5 0.0
4 4 0.0
4 5 -1.4739801787335056
5 5 0.0