#include<iostream>
#include<cstdio>
using namespace std;
int times[100000000];
int zhi[100000000];
int main(){
	freopen("sum.in","r",stdin);
	freopen("sum.out","w",stdout);
	int n,he,c;
	cin>>n;
	for(int i=1;i<=n;i++){
		int tmp;
		cin>>tmp;
		times[i]=tmp;
	}
	int m,B;
	cin>>m;
	for(int j=1;j<=m;j++){
		int a,b;
		cin>>a>>b;
		int M=0;
		for(int i=a;i<=b;i++){
		M=times[i]+M;
		B=M;
		}
		zhi[j]=B;
		}
	for(int i=1;i<=m;i++){
		printf("%d\n",zhi[i]);
	}
	return 0;
}