Function main

CPP/array-2d/prefix_lr.cpp:12–30

using namespace std;
int main(){
	read(n);
	for (int i = 1; i <=n; ++i)
	{
		cin>>arr[i];
	}
	read(t);
	while(t--){
		read(l);read(r);
		ll sum=0;
		for (int i = l; i <= r; ++i)
		{
			sum+=arr[i];
		}			
		cout<<sum<<endl;
	}

	return 0;
}