[HackerEarth] Micro has just learned about permutations. So he went to Ravi's room to boast about it. But Ravi is very smart, he instead gave him a problem to solve. He gave him an array A of integers - 题解

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题目信息
题号 P17728
标题 [HackerEarth] Micro has just learned about permutations. So he went to Ravi's room to boast about it. But Ravi is very smart, he instead gave him a problem to solve. He gave him an array A of integers
难度 普及-
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