Problem:
Score : 200 points

Problem Statement

You have written N problems to hold programming contests.
The i-th problem will have a score of P_i points if used in a contest.

With these problems, you would like to hold as many contests as possible under the following condition:

A contest has three problems. The first problem has a score not greater than A points, the second has a score between A + 1 and B points (inclusive), and the third has a score not less than B + 1 points.

The same problem should not be used in multiple contests.
At most how many contests can be held?

Constraints

3 \leq N \leq 100

1 \leq P_i \leq 20 (1 \leq i \leq N)

1 \leq A < B < 20

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
A B
P_1 P_2 ... P_N

Output

Print the answer.

Sample Input 1

7
5 15
1 10 16 2 7 20 12

Sample Output 1

2

Two contests can be held by putting the first, second, third problems and the fourth, fifth, sixth problems together.

Sample Input 2

8
3 8
5 5 5 10 10 10 15 20

Sample Output 2

0

No contest can be held, because there is no problem with a score of A = 3 or less.

Sample Input 3

3
5 6
5 6 10

Sample Output 3

1

Solution in C# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;

namespace at
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());            
            string h = Console.ReadLine();
            string p = Console.ReadLine();

            char[] CharSeparators = new char[] {' '};
            string[] listh = h.Split(CharSeparators);
            string[] listp = p.Split(CharSeparators);

            int a = int.Parse(listh[0]);
            int b = int.Parse(listh[1]);
            
            int count =0;
            for (int i = 0; i < n; i = i+3)
            {
                if(int.Parse(listp[i])<=a)
                {
                    if(int.Parse(listp[i+1])>=a+1 || int.Parse(listp[i+1]) <= b)
                    {
                        if(int.Parse(listp[i+2])>=b+1)
                        {
                            count = count + 1;
                        }
                    }
                } 
            }
            Console.WriteLine(count);
        }
    }
}