#include<stdio.h>
int main () {
	int budget[13]={0};
	int i,now=0;
	int mom=0;
	for(i=1;i<=12;i++){
		scanf("%d",&budget[i]);
	}
	
	for(i=1;i<=12;i++){
		now=now+(300-budget[i]);
		if((now/100)>0){
			mom+=(now/100);
			now-=(now/100)*100;
		}
		if((now+300)<budget[i+1]){
			printf("-%d",i+1);
			goto out;
		}
	}
	
	printf("%d",mom*120+now);
	out:
	return 0;
}