#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#include "bits/stdc++.h"
#define REP(i,a,b) for(i=a;i<b;++i)
#define rep(i,n) REP(i,0,n)
#define ll long long
#define ull unsigned ll
typedef long double ld;
#define ALL(a) begin(a),end(a)
#define ifnot(a) if(not a)
#define dump(x)  cerr << #x << " = " << (x) << endl
using namespace std;

// #define int ll
bool test = 0;
int dx[] = { 0,1,0,-1 };
int dy[] = { 1,0,-1,0 };
#define INF (1 << 28)
ull mod = (int)1e9 + 7;
//.....................
#define MAX (int)1e6 + 5

string manth_name = "9";

signed main(void) {
  ll L, M, N;
	ll a[] = { 1,25,100,1000 };
	cin >> L >> M >> N;
	ll money = 0;
	ll cnt = 0;

	money += N;
	cnt += money % 25;
	money -= money % 25;

	money += M * 25;
	cnt += (money % 100) / 25;
	money -= money % 100;

	money += L * 100;
	cnt += (money % 1000) / 100;
	money -= money % 1000;

	cout << cnt << endl;
}