Problem3418--【Div3】abc407c - Security 2

3418: 【Div3】abc407c - Security 2

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 4Submit Num: 4Statistics

Description



Sample Input Copy 

21

Sample Output Copy 

4

Source/Category

Div3 字符串 思维 
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