You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
#include <bits/stdc++.h>
|
|
|
|
using namespace std;
|
|
const int N = 100010;
|
|
int s[N];
|
|
// 一维前缀和
|
|
int main() {
|
|
int n, m;
|
|
cin >> n >> m;
|
|
for (int i = 1; i <= n; i++) {
|
|
int x;
|
|
cin >> x;
|
|
s[i] = s[i - 1] + x;
|
|
}
|
|
while (m--) {
|
|
int l, r;
|
|
cin >> l >> r;
|
|
printf("%d\n", s[r] - s[l - 1]);
|
|
}
|
|
return 0;
|
|
} |
