Problem 4619. -- [2018国家集训队清华测试]我的生命已如风中残烛

4619: [2018国家集训队清华测试]我的生命已如风中残烛

Time Limit: 100 Sec  Memory Limit: 512 MB
Submit: 5  Solved: 4
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Description

Input

Output

HINT

Source

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