#include<stdio.h>
int main(){
    int k=0,n,money,flag=1,cnt,sum;
    int a[12];

    for(int i=1;i<=12;i++){
    	money+=300;
    	 scanf("%d",&a[i]);
        money-=a[i];
         if(money<0){
         	flag=0;
            cnt=i;
            break;
        }
         sum+=money/100;
         money%100;
    }
    if(flag==1){
        money+=sum*120;
        printf("%d",money);
    }else{
        printf("-%d",cnt);
    }
    return 0;
}