#include <bits/stdc++.h>

int main(){
    int money[12];
    int mother,hand,ans;
    int outputAns = 1;
    for(int i=0;i<12;i++){
        scanf("%d",&money[i]);
    }
    hand,mother = 0;
    for(int i=0;i<12;i++){
        hand = hand + 300;
        if((hand - money[i]) < 0){
            printf("-%d",i+1);
            outputAns = 0;
            break;
        }else if((hand - money[i])/100 > 0){
            hand = hand - ((hand-money[i])/100)*100;
            mother = mother + ((hand-money[i])/100)*100;
            hand = hand - money[i];
        }
    }
    ans = hand + mother*0.2;
    if(outputAns){
        printf("%d",ans);
    }
	return 0;
}