#include <stdio.h>

int main(void) {
	int nominals[] = {25,10,5,1};
	
	float fn;
	do {
		scanf("%f",&fn);
	} while(fn<0.0);
	int n = round(100*fn);
	
	int s = 0;
	for(int *nominal=&nominals;nominal<nominals+(sizeof nominals/sizeof nominals[0]); ++nominal) {
		s += n / *nominal;
		n %= *nominal;
	}
	
	printf("%d\n",s);
	return 0;
}