Score : 400 points
Given is a number sequence A of length N.
Find the number of integers i \left(1 \leq i \leq N\right) with the following property:
Input is given from Standard Input in the following format:
N A_1 A_2 \cdots A_N
Print the answer.
5 24 11 8 3 16
3
The integers with the property are 2, 3, and 4.
4 5 5 5 5
0
Note that there can be multiple equal numbers.
10 33 18 45 28 8 19 89 86 2 4
5