05前缀和模板

 
 
import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
 
 
        Scanner scanner=new Scanner(System.in);
        int col=scanner.nextInt();
        int row=scanner.nextInt();
 
 
        int arr[] =new int[col+1];
        int sum[]=new int[col+1];
 
        for(int i=1;i<=col;i++){
            arr[i]=scanner.nextInt();
            sum[i]=sum[i-1]+arr[i];
        }
 
        while(row-->0){
            int l=scanner.n