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Decode Ways 2

Title: Decode Ways Source: leetcode.com A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 1234 'A' -> 1'B' -> 2...'Z' -> 26 Given an encoded message containing digits, determine the total number of ways to decode it. For example, ...