#include<stdio.h>
int main(){
    int sum=0,i,cost,n;
    int depoit=0,flag=1;
    for(i=1;i<=12;i++){
        scanf("%d",&cost);
        sum=sum+300-cost;
        if(sum>=100){
            n=sum/100;
            depoit=depoit+100*n;
            sum=sum%100;
        }
        if(sum<0){flag=0;
            break;
        }
    }
    if(flag) printf("%d",sum+1.2*depoit);
    else printf("%d",-i);
    return 0;
}