import java.util.*;

public class PiggyBank {
    public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
        try{
            int Yen100 = scanner.nextInt();
            int Yen25  = scanner.nextInt();
            int Yen1   = scanner.nextInt();          
            int Amari = 0 ;
            
            if(Yen1>1000){
                System.out.println("指定の範囲を超えています");
                System.exit(0);
            }
            if(Yen25>1000){
                System.out.println("指定の範囲を超えています");
                System.exit(0);
            }
            if(Yen100>1000){
                System.out.println("指定の範囲を超えています");
                System.exit(0);
            }
            
            if(Yen1 >= 25){
                Yen25 = Yen25 + Yen1/25;
                Amari = Yen1 % 25 ;
            }else{
                Amari = Yen1;
            }
            if(Yen25 >= 4){
                Yen100 = Yen100 + Yen25/4;
                Amari += Yen25 % 4;
            }else{
                Amari += Yen25;
            }
            if(Yen100 >= 10){
                Amari += Yen100 % 10;
            }else{
                Amari += Yen100;
            }
            
    System.out.println(Amari);
    
        }catch(InputMismatchException e){
             System.out.println("数字を入力してください。");
        }catch(Exception E){
             System.out.println("予期せぬエラーです");
        }  
    }
}