#include <bits/stdc++.h>
using namespace std;
int c[10010];
int n;
int lowb(int x)
{
	return x & -x;
}
long long getsum(int x)
{
	long long sum=0;
	while(x>0)
	{
		sum+=c[x];
		x-=lowb(x);
	}
	return sum;
}
void chang(int x,int value)
{
	while(x<=n)
	{
		c[x]+=value;
		x+=lowb(x);
	}
}
int main()
{
	int a[10010];
	int m;
	int x,y;
	freopen("sum.in","r",stdin) ;
	freopen("sum.out","w",stdout);
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
		chang(i,a[i]);
	}
	cin>>m;
	for(int i=1;i<=m;i++)
	{
		cin>>x>>y;
		cout<<getsum(y)-getsum(x-1)<<endl;
	}
	return 0;
}