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 Scala (2.11.7) (judge verdict: Wrong Answer)

object Main extends App{
  override def main(args:Array[String])={
    var num = readInt
    if(num%4==0) println("Yes")
    else if(num%7==0) println("Yes")
    else{
      var n = num/4
      var flag = false
      for(i <- 1 to n if !flag){
        var money = 4*i
        var left = num-money
        if(left%7==0){
          println("Yes")
          flag = true
        }
    }
    println("No")  
  }
  }
}