I got Ac finally
To my surprise , I found that some ac-code can't pass these tests
5 7
2 4 3
5 4 1
4 5 5
1 2 3
3 5 4
5 1 7
1 3 5
7
2 4
2 5
1 4
5 1
1 1
2 5
2 5
10 20
8 1 5
9 4 7
3 10 4
7 2 5
5 6 1
7 1 6
7 4 5
1 5 1
5 9 6
5 3 7
3 6 2
10 4 6
4 2 2
3 7 4
9 3 1
4 7 2
2 8 1
10 6 1
5 2 4
9 5 3
20
10 7
3 7
3 10
3 4
2 10
1 9
6 10
6 9
2 2
9 5
1 1
6 1
4 4
3 5
2 3
7 1
2 3
9 7
10 4
2 2
5 7
3 4 6
2 1 1
5 4 7
2 4 7
2 5 7
2 3 3
4 2 3
20
1 5
2 4
1 5
2 2
3 3
5 2
4 1
2 4
3 4
1 3
1 2
4 1
2 1
2 4
3 2
3 1
5 5
1 4
4 5
2 1
0 0

Answer
0
0
0
0
0
0
0

0
0
0
0
0
0
Nao e possivel entregar a carta
Nao e possivel entregar a carta
0
0
0
Nao e possivel entregar a carta
0
0
0
0
0
0
0
0

Nao e possivel entregar a carta
0
Nao e possivel entregar a carta
0
0
0
1
0
0
Nao e possivel entregar a carta
Nao e possivel entregar a carta
1
1
0
0
1
0
Nao e possivel entregar a carta
0
1

• But! (94) bjbjmtr 2016-02-16 10:39:31