Problem P: GESP 四 202503-编程2

Problem P: GESP 四 202503-编程2

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Time Limit : 1.000 sec  Memory Limit : 128 MiB

SubmitProblemListSolved: 1Submit Num: 1StatisticsShowOff!

Description

Sample Input Copy 

3 4
1 2 1 0
2 4 2 1
0 3 3 0

Sample Output Copy 

2
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