ggbooo的博客

题意，给定n个数，m。求n个数中有多少连续的区间和等于m 题解：用前缀和优化，mp数组记录值，要开long long 不然wa 代码： #include <bits/stdc++.h> #define endl "\n" #define rep(i, m, n) for (int i = (m); i <= (n); ++i) #define rrep(i, m, n) for (int i = (m); i >= (n); --i) #define IOS ios::sync_wi