#include <cstdio>
#include <cctype>
#include <algorithm>
#include <cstring>

#define Lowbit(x) (x&(-x))

typedef long long LL;
using namespace std;
const int maxn=10010;

LL c[maxn];
int n;

inline void Add(int x,LL k){
	while(x<=n){
		c[x]+=k;
		x+=Lowbit(x);
	}
}

inline LL Query(int x){
	LL ans=0;
	while(x!=0){
		ans+=c[x];
		x-=Lowbit(x);
	}
	return ans;
}

int main(){
	freopen("sum.in","r",stdin);
	freopen("sum.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		LL x;
		scanf("%lld",&x);
		Add(i,x);
	}
	int e;
	scanf("%d",&e);
	for(int i=1;i<=e;i++){
		int x,y;
		scanf("%d%d",&x,&y);
		printf("%lld\n",Query(y)-Query(x-1));
	}
	return 0;
}