#import <stdio.h>

int main(){
	int a,b,c;
	int sum = 0;
	int ans = 0;
	
	scanf("%d",&a);
	scanf("%d",&b);
	scanf("%d",&c);
	
	sum = a * 100 + b * 25 + c;
	sum = sum % 1000;
	
	ans += (sum / 100);
	sum = sum % 100;
	
	ans += (sum / 25);
	sum = sum % 25;
	
	ans += sum;
	
	printf("%d",ans);
	
	return 0;
}