Web Reference: Can you solve this real interview question? String Compression - 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. May 18, 2012 · For instance, in the string "ABBA", the substring would be the whole string. Also, taking the length of the substring is equivalent to subtracting the two indexes. The key insight is that we need to perform the compression in-place while reading and writing to the same array. Since we're compressing (reducing consecutive characters to a character and count), the write position will never overtake the read position - this makes in-place modification safe.
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