Problem3593--【Div4】人事变动

3593: 【Div4】人事变动

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 4Submit Num: 5Statistics

Description



Sample Input Copy 

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

Sample Output Copy 

1
-1
-1
1

Source/Category

循环嵌套 数组 桶 
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