int main(){
     int money=300;
     int save=0;
     int sum_save=0;
     int spend;
     int i;
     int ret=1;
     
     for(i=1;i<13;i++){
     
     	scanf("%d",&spend);
     	if(money-spend>=0){
		     if(money-spend>=100){
     		    save=((money-spend)/100)*100;
     		    sum_save+=save;
     	       	money=(money-spend)%100;
     		    money+=300;
     		    save=0;
		      }
		      else{
 			  money=money-spend+300;}
     		}
     		else{printf("-%d",i);
			 break;
			 ret=-1;
			 }
	 }
	 sum_save=sum_save*1.2+money-300;
	 if(ret=1){
	 printf("%d",sum_save);}
	 
	return 0;
}