Decode Ways
Updated Feb 24, 2026
Problem
Return number of ways to decode the string.
Constraints
1 <= s.length <= 100
Examples
Example 1
Input:
{"s": "12"}
Output:
2
Function Signature
def numDecodings(self, s: str) -> int
How to Submit
Implement a Solution class with a numDecodings method.
Your method will be called with the input parameters and should return the answer.