#include<stdio.h>

int main(void){
	int iti,nigo,hyaku,total,count=0;
	int i;
	scanf("%d",&hyaku);
	scanf("%d",&nigo);
	scanf("%d",&iti);

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


	for(i = 0;i < 100000;i++){
		/*
		printf("%d\n",total);
		printf("--%d--\n",count);
		*/
		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){
			break;
		}


	}

	printf("%d\n",count);

	return 0;
}