RETEA
1 0
4
1 39 124 0 0
2 167 40 0 0
3 168 209 0 0
4 305 127 0 0
1 4
1 2 0 2 2 0
1 3 0 4 3 0
2 3 0 3 2 0
2 4 0 1 0 0
3 4 0 5 5 0