#include<bits/stdc++.h>

using namespace std;
const int N = 100001;
int a[N],s[N],n,m;
inline int read(){
	int n=0,f=1;
	char c=getchar();
	while(c>='0'&&c<='9'){
		n=n*10+(c-'0');
		c=getchar();
	}
	return n*f;
}
inline void write(int x){
	if(x>9)write(x/10);
	putchar(x%10+'0');
}
int main(){
	n=read();
	for(int i=1;i<=n;i++)a[i]=read();
	for(int i=1;i<=n;i++)s[i]=s[i-1]+a[i];
	m=read();
	for(int i=1;i<=m;i++){
		int x=read(),y=read();
		write(s[y]-s[x-1]);
		putchar('\n');
	}
	return 0;
}