Strip Unwanted Characters from Input

Medium ⏱ 12 min 55% acceptance ★★★★☆ 4.4

Write remove_chars(s, chars_to_remove) that returns s with every character that appears in chars_to_remove deleted, leaving all other characters (including spaces) untouched.

Examples

Example 1

Input

s = 'Hello, World!123', chars_to_remove = ',!123'

Output

'Hello World'

Explanation

Every character found in ',!123' is removed; letters and the space survive.

Constraints

0 <= len(s) <= 10^4

Topics

StringsSanitization

Companies

PayPalRazorpay

Hints

Hint 1

Convert chars_to_remove into a set for O(1) membership checks.

Hint 2

Build the result with a generator expression that keeps characters not in that set.

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