AlgorithmOJ

2026-11-04 12:58:36 

Sum

Time Limit: 1000ms
Memory Limit: 131072KB
This problem will be judged on HDU. Original ID: 4704
64-bit integer IO format: %I64d      Java class name: Main
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Description

Sample Input 

2

Sample Output 

2

Source

2013 Multi-University Training Contest 10
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