#include<iostream>
#define f(i,n) for(i=1;i<=n;i++)
using namespace std;int a[100001],b[100001],n,i,j,s1,s2;main(){cin>>n;f(i,n)cin>>i[a];f(i,n)cin>>i[b];f(i,n){f(j,i)s1+=j[a],s2+=j[b];if(s1<s2)return(cout<<i,0);}}

AC#6#7,其余WA