bzoj 3509: [CodeChef] COUNTARI — 分块+FFT
3509: [CodeChef] COUNTARI Time Limit: 40 Sec Memory Limit: 128 MB Description 给定一个长度为N的数组A[],求有多少对i, j, k(1<=...
3509: [CodeChef] COUNTARI Time Limit: 40 Sec Memory Limit: 128 MB Description 给定一个长度为N的数组A[],求有多少对i, j, k(1<=...
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