#include<stdio.h>

int main(void){
	int iti,nigo,hyaku,total,count;
	int i;
	scanf("%d",&iti);
	scanf("%d",&nigo);
	scanf("%d",&hyaku);

	total = iti*1 + nigo*25 + hyaku*100;


	for(i = 0;i < 100000;i++){
		if(total >= 1000){
			total -= 1000;
		}else if(total >= 100){
			total -= 100;
			count++;
		}else if(total >= 25){
			total -= 25;
			count++;
		}else if(total >= 1){
			total -= 1;
			count++;
		}else if(total == 0){
			count = count-1;
			break;
		}

		//printf("%d\n",total);
	}

	printf("%d",count);

	return 0;
}