2015/round3/gentrification_sample_input.txt

5
4 4
0 1
1 2
2 3
3 0
4 3
0 1
1 2
2 3
6 6
0 1
1 0
2 3
3 2
4 5
5 4
6 8
0 1
1 0
2 3
3 2
4 5
5 4
0 2
1 4
4 4
0 1
0 2
1 3
2 3