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 (GCC 5.4.1) (judge verdict: Runtime Error)

#include<stdio.h>

int main(void)
{
  int n;
  int a, b;
  int p[100];
  int q[100];
  int i, j;
  int point_check;
  int sum = 0;

  for(i = 0; i < n; i++){
    p[i] = 0;
    q[i] = 0;
  }

  scanf("%d", &n);
  scanf("%d%d", &a, &b);

  for(i = 0; i < n; i++){
    scanf("%d", &p[i]);
  }

  for(i = 0; i < n; i++){
    if( p[i] < a+1){
      point_check = 1;
    }
  }
  if(point_check == 0){
    printf("0\n");
    return 0;
  }

  for(j = 0; j < 3; j++){
    for(i = 0; i < n; i++){
      if(q[i] == 0 && p[i] < a+1){
        q[i] = 1;
      }
      if(q[i] == 0 && a < p[i] && p[i] < b+1){
        q[i] = 1;
      }
      if(q[i] == 0 && b < p[i]){
        q[i] = 1;
      }
    }
  }

  for(i = 0; i < n; i++){
    sum = sum + q[i];
  }

  printf("%d\n", sum/3);

  return 0;
}