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几组测试数据

Posted by ecjtuwf at 2008-08-22 17:24:48 on Problem 1724 
input:
19
6
7
1 2 2 2
1 3 2 2
1 4 2 2
2 5 5 10
4 5 7 7
3 5 10 5
5 6 5 10
ouput:
14

input:
15
12
16
1 8 20 0
1 2 10 0
2 8 5 0
1 7 100 0
2 3 5 1
3 4 5 1
4 5 5 1
5 6 5 1
6 12 5 1
8 12 10 20
8 9 1 1
9 10 1 1
10 11 1 1
11 7 2 10
7 12 10 1
11 4 1 0
output:
30

input:
250
21
244
1 2 99 0
1 3 17 0
1 4 81 0
1 5 46 0
1 6 79 0
1 8 97 0
1 10 68 0
1 14 17 0
1 18 87 0
2 1 41 0
2 3 10 0
2 4 1 0
2 5 40 0
2 6 35 0
2 7 4 0
2 8 35 0
2 9 89 0
2 10 36 0
2 14 61 0
2 15 53 0
2 20 23 0
3 1 8 0
3 2 81 0
3 4 40 0
3 5 89 0
3 6 3 0
3 7 10 0
3 8 93 0
3 9 99 0
3 10 69 0
3 12 50 0
3 17 83 0
4 1 96 0
4 2 37 0
4 3 32 0
4 5 59 0
4 6 54 0
4 7 70 0
4 9 19 0
4 14 56 0
4 17 95 0
4 20 62 0
5 1 93 0
5 2 63 0
5 3 32 0
5 4 68 0
5 6 22 0
5 7 32 0
5 8 96 0
5 10 9 0
5 11 64 0
5 12 42 0
5 13 23 0
5 14 96 0
5 15 51 0
6 2 77 0
6 3 56 0
6 4 31 0
6 5 40 0
6 7 61 0
6 8 67 0
6 9 24 0
6 10 18 0
6 11 6 0
6 14 68 0
7 2 86 0
7 4 22 0
7 5 50 0
7 6 93 0
7 8 66 0
7 9 2 0
7 10 80 0
7 11 70 0
7 12 80 0
7 13 50 0
7 14 57 0
7 15 17 0
7 16 78 0
7 17 35 0
7 20 19 0
8 1 72 0
8 3 49 0
8 4 32 0
8 5 8 0
8 6 3 0
8 7 23 0
8 9 32 0
8 10 54 0
8 11 34 0
8 12 85 0
8 15 9 0
8 16 38 0
9 2 28 0
9 6 8 0
9 7 51 0
9 8 72 0
9 10 92 0
9 11 14 0
9 12 73 0
9 13 74 0
9 15 96 0
9 17 43 0
9 18 32 0
9 19 34 0
9 20 33 0
10 2 41 0
10 3 1 0
10 5 66 0
10 7 34 0
10 8 35 0
10 9 49 0
10 11 91 0
10 12 82 0
10 13 10 0
10 14 88 0
10 15 68 0
10 16 34 0
10 17 73 0
10 19 82 0
11 2 6 0
11 5 41 0
11 6 94 0
11 7 24 0
11 8 6 0
11 9 12 0
11 10 9 0
11 12 93 0
11 13 5 0
11 14 32 0
11 15 36 0
11 16 80 0
11 19 79 0
11 20 90 0
12 3 31 0
12 5 45 0
12 6 79 0
12 7 64 0
12 8 66 0
12 9 57 0
12 10 59 0
12 11 68 0
12 13 5 0
12 14 76 0
12 15 21 0
12 16 76 0
12 17 83 0
12 18 54 0
13 2 96 0
13 4 15 0
13 5 60 0
13 6 98 0
13 7 91 0
13 8 50 0
13 10 17 0
13 11 8 0
13 12 81 0
13 14 43 0
13 15 79 0
13 16 13 0
13 17 72 0
13 18 83 0
13 20 60 0
14 3 25 0
14 5 91 0
14 6 57 0
14 8 6 0
14 10 88 0
14 11 98 0
14 12 65 0
14 13 43 0
14 15 47 0
14 16 64 0
14 17 79 0
14 18 55 0
14 19 31 0
14 20 87 0
15 5 85 0
15 7 98 0
15 9 53 0
15 11 98 0
15 12 98 0
15 13 38 0
15 14 77 0
15 16 84 0
15 17 31 0
15 18 24 0
15 19 54 0
15 20 53 0
16 6 86 0
16 8 76 0
16 9 74 0
16 10 83 0
16 11 78 0
16 12 51 0
16 13 11 0
16 14 5 0
16 15 86 0
16 17 5 0
16 18 55 0
16 19 27 0
16 20 27 0
17 2 25 0
17 6 39 0
17 9 43 0
17 11 16 0
17 12 57 0
17 13 97 0
17 14 56 0
17 15 98 0
17 16 1 0
17 18 77 0
17 19 16 0
17 20 58 0
18 2 96 0
18 5 24 0
18 8 85 0
18 14 60 0
18 15 42 0
18 16 90 0
18 17 87 0
18 19 61 0
18 20 83 0
19 4 77 0
19 5 10 0
19 10 15 0
19 12 71 0
19 13 75 0
19 14 36 0
19 15 23 0
19 16 14 0
19 17 87 0
19 18 40 0
19 20 7 0
20 4 61 0
20 9 19 0
20 11 92 0
20 12 84 0
20 13 87 0
20 15 31 0
20 16 93 0
20 17 59 0
20 18 42 0
20 19 52 0
20 21 10 10

output:
56
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