AcWing 795. 前缀和(Java)
原题链接
简单
作者:
火球大的脸盆
,
2022-07-07 17:51:08
,
所有人可见
,
阅读 122
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int m = sc.nextInt();
int[] q = new int[n + 1];
for (int i = 1; i <= n; i++) q[i] = sc.nextInt();
int[] sum = new int[n + 1];
for (int i = 1; i <= n; i++) {
sum[i] = sum[i - 1] + q[i];
}
while (0 != m--) {
int l = sc.nextInt(), r = sc.nextInt();
System.out.println(sum[r] - sum[l - 1]);
}
}
}