import java.util.Scanner;
class Tyokinbako{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    int d = (c / 25 + b) * 25 / 100;
    int e = (d + a) * 100 / 1000;
    int sum = c % 25 + (((c / 25 + b) * 25) % 100) / 25 + (((d + a) * 100) % 1000) / 100;
    System.out.println(sum);
  }
}