using System;
class Program {
    static void Main(string[] args) {
        //100円玉の枚数
        int L = int.Parse(Console.ReadLine());
        //25円玉の枚数
        int M = int.Parse(Console.ReadLine());
        //1円玉の枚数
        int N = int.Parse(Console.ReadLine());

        //合計金額
        int sum = L * 100 + M * 25 + N;

        //1000円札の枚数
        int O_result = sum / 1000;
        //100円玉の枚数
        int L_result = (sum - O_result * 1000) / 100;
        //25円玉の枚数
        int M_result = (sum - O_result * 1000 - L_result * 100) / 25;
        //1円玉の枚数
        int N_result = sum % 25;

        Console.WriteLine(L_result + M_result + N_result);
    }
}