Problem:
Score : 200 points

Problem Statement

La Confiserie d'ABC sells cakes at 4 dollars each and doughnuts at 7 dollars each.
Determine if there is a way to buy some of them for exactly N dollars. You can buy two or more doughnuts and two or more cakes, and you can also choose to buy zero doughnuts or zero cakes.

Constraints

N is an integer between 1 and 100, inclusive.

Input

Input is given from Standard Input in the following format:

N

Output

If there is a way to buy some cakes and some doughnuts for exactly N dollars, print Yes; otherwise, print No.

Sample Input 1

11

Sample Output 1

Yes

If you buy one cake and one doughnut, the total will be 4 + 7 = 11 dollars.

Sample Input 2

40

Sample Output 2

Yes

If you buy ten cakes, the total will be 4 \times 10 = 40 dollars.

Sample Input 3

3

Sample Output 3

No

The prices of cakes (4 dollars) and doughnuts (7 dollars) are both higher than 3 dollars, so there is no such way.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
class Program
 {
   static void Main(string[] args)
   {
     int N;
     N = int.Parse(Console.ReadLine());
     bool f=false;

     for(int i = 0; i < 26 ;i++)
     {
       for(int j = 0; j < 15 ;j++ )
       {
        if(4*i+7*j==N)
        {
          if(!f)
          {
            Console.WriteLine("Yes");
          }
          f = true;
          break;
        } 
       }
     }

     if(!f)
     {
       Console.WriteLine("No");
     }
     
   }
 }