#include<stdio.h>
int a[100001];
int bit[1000001];
int n;
int lowbit(int x)
{
	return x&(-x);
}
int built()
{
	for(int i=1;i<=n;i++)
	{
		bit[i]=a[i];
		for(int j=i-1;j>i-lowbit(i);j-=lowbit(j))
		 bit[i]+=bit[j];
	}
}
int sum(int x)
{
	int ans=0;
	for(int i=x;i>0;i-=lowbit(i))
	 ans+=bit[i];
	return ans;
}
int l,r,m;
int main()
{
	freopen("sum.in","r",stdin);
	freopen("sum.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
	 scanf("%d",&a[i]);
	scanf("%d",&m);
	built();
	for(int i=1;i<=m;i++)
	 {
	 	scanf("%d%d",&l,&r);
	 	printf("%d\n",sum(r)-sum(l-1));
	 } 
}