#include "bits/stdc++.h"
using namespace std;
int a[13];
int xz=0;
int main(){

	for(int i=1;i<=12;++i){
		cin>>a[i];
	}
	
	for(int i=1;i<=12;++i){
	xz+=300;
		xz-=a[i];
		xz-=xz/100*100;
		if(xz<0){
			cout<<'-'<<i;
			return 0;
		}
	}
	cout<<xz;
	
	

}