Problem3594--【Div3】植树

3594: 【Div3】植树

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 3Submit Num: 4Statistics

Description



Sample Input Copy 

5
1 5
1 7
1 8
2 7
1 3

Sample Output Copy 

1
2
3
1
2

Source/Category

atcoder 数据结构 map set 
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