#include<iostream>
#include<cstdio> 
using namespace std;
int main(){
	freopen("sum.in","r",stdin);
	freopen("sum.out","w",stdout);
	int n,m,i,b,c,j,ans=0,l;long long a[10010];
	cin>>n;a[0]=0;
	for(i=1;i<=n;i++)
	{
		cin>>l;
		a[i]=a[i-1]+l;
	}
		
	cin>>m;
	for(i=1;i<=m;i++)
	{
		ans=0;
		cin>>b>>c;
		ans=a[c]-a[b-1];
		cout<<ans<<endl;
	}
	return 0;
}