C++实现快速计算队员战斗力区间和

```cpp #include <iostream> #include <vector> using namespace std; int main() { int n, m; cin >> n >> m; // 存储每个人的战斗力 vector<int> a(n + 1); for (int i = 1; i <= n; i++) { cin >> a[i]; } // 前缀和数组 vector<int> prefixSum(n + 1, 0); for (int i = 1; i <= n; i++) { prefixSum[i] = prefixSum[i - 1] + a[i]; } for (int i = 0; i < m; i++) { int L, R; cin >> L >> R; // 计算区间 [L, R] 的战斗力之和 cout << prefixSum[R] - prefixSum[L - 1] << endl; } return 0; } ``` ######[AI问答 | 238点数解答 | 2026-04-08 21:04:56]