Web Reference: Given an array of characters chars, compress it using the following algorithm: Begin with an empty string s. For each group of consecutive repeating characters in chars: If the group's length is 1, append the character to s. Otherwise, append the character followed by the group's length. In-depth solution and explanation for LeetCode 443. String Compression in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. Begin with an empty string s. For each group of consecutive repeating characters in chars: If the group's length is 1, append the character to s. Otherwise, append the character followed by the group's length. After you are done modifying the input array, return the new length of the array.
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