https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=1786

uva user try has asked problem author for test cases,he sends tests to me,but there are two tests incorrect:

11 20

8 10 78

9 5 4

3 2 9

11 1 46

6 5 46

5 3 14

9 6 75

11 6 5

6 7 16

9 8 62

9 10 78

4 7 42

7 8 53

4 11 10

6 10 38

11 8 60

8 3 16

4 1 16

4 10 41

11 10 20

4 11 9

11 20

5 7 74

5 4 52

10 6 64

2 7 45

7 1 63

10 7 48

3 8 16

3 10 39

7 8 25

11 5 40

2 5 47

4 6 13

3 4 11

11 6 27

10 11 23

4 8 76

1 6 45

9 11 59

7 6 6

11 1 31

8 11 5

first tests offical answer is 163 but mine is 168.

second test offical answer is 202 but mine is 206.

you can used first edge sets:0,3，6,7,8,10,11,12,13，14,17,18，19 to run first troops. its max_flow value is 108.

and use remain edges to run second troops.its max_flow value is 60 . so 163 is definetly incorrect..

sencond test is similar;

you use first edge sets:1,3,5,6,7,8,10,11,12,15 to run first troops .its max_flow value is 109;

use other edge sets to run second troops it is 97

so second answer is 206