Competitions

# Week 6: December 14 - 20. Char arrays 1

# Number of digits

Given a string that contains an expression of numbers, signs of arithmetic operations and brackets. Find the number of digits used in the expression.

#### Input data

Arithmetic expression containing numbers, brackets, and arithmetic characters.

#### Output

Print the number of digits in the expression.

Input example #1

9*8+76-54/3+2**10

Output example #1

10