Score : 100 points
You are given an integer N that has exactly four digits in base ten.
How many times does 2
occur in the base-ten representation of N?
Input is given from Standard Input in the following format:
N
Print the answer.
1222
3
2
occurs three times in 1222
. By the way, this contest is held on December 22 (JST).
3456
0
9592
1