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codeforces(4) pta(1) 图论(1) 差分数组(1) 思维(2) 数位dp(1) 未归档(27) 树状数组的拓展(1)

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POJ 3253 Fence Repair

Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needs N (1 ≤ N ≤ 20,000) planks of...

2018-09-16

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