#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main(void) {
	int hyak, nico, ich, sum, coin = 0;

	scanf("%d%d%d", &hyak, &nico, &ich);
	sum = (hyak * 100) + (nico * 25) + ich;

	while (sum >= 1000)
		sum -= 1000;

	while (sum >= 100) {
		sum -= 100;
		coin++;
	}
	while (sum >= 25) {
		sum -= 25;
		coin++;
	}

	printf("%d\n", coin + sum);

	return 0;
}