Problem3614--【Div2】GESP202409五级 - 挑战怪物

3614: 【Div2】GESP202409五级 - 挑战怪物

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 1Submit Num: 1Statistics

Description



Sample Input Copy 

3
6
188
9999

Sample Output Copy 

2
4
-1

Source/Category

GESP 数学 质数 贪心 
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