Problem1173--防守战线

1173: 防守战线

Time Limit: 3 Sec  Memory Limit: 512 MB
Submit: 1  Solved: 1
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Description

Sample Input Copy 

5 3
1 5 6 3 4
2 3 1
1 5 4
3 5 2

Sample Output Copy 

11

HINT

Source/Category

ZJOI2013 NOIP 省选 高级 
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