#include <iostream>

using namespace std;

int main (void){
	int L   = 0, M = 0, N = 0;
	int ans = 0;

	// input
	cin >> L >> M >> N;

	// solve
	M  += (N * 1) / 25;
	N   = (N * 1) % 25 / 1;
	L  += (M * 25) / 100;
	M   = (M * 25) % 100 / 25;

	L   = (L * 100) % 1000 / 100;
	ans = N + M + L;

	// output
	cout << ans << endl;

	return 0;
}