#CSPJ2019A. 数字游戏 (Number Games)
数字游戏 (Number Games)
Description
Little K sent a binary string of length to Little P to play a number game. Little P wants to know how many times the character occurs in the string.
Note: A binary string is a string in which each character is either or . E.g., "101
" (withuot quotes) is a binary string of length .
Input Format
The input has only one line consisting of a binary string of length .
Output Format
Print the number of times the character occurs in .
00010100
2
Constraints
For of the data, all characters in the string are s.
For of the data, the input may contain both s and s. The length of the string is .