#D518. Cost Performance Flow
Cost Performance Flow
Cost Performance Flow
Example
Input
2 1 1 2 1 2 1 1
Output
1/2
inputFormat
Input
2 1 1 2 1 2 1 1
outputFormat
Output
1/2
样例
2 1
1 2
1 2 1 11/2
Example
Input
2 1 1 2 1 2 1 1
Output
1/2
Input
2 1 1 2 1 2 1 1
Output
1/2
2 1
1 2
1 2 1 11/2