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Home/Questions/Python/Coding/Given the input string "AAABBBCCCDDDAAA," compress it to output "A3B3C3D3A3."

Given the input string "AAABBBCCCDDDAAA," compress it to output "A3B3C3D3A3."

Python/Codingeasy0.1 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Python/Coding
Difficulty Split
127E|24M|28H
in this category
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1,863
across 7 categories
Asked at these companies
S&P Global
Expert AnswerPremium
24 wordsInterview-ready
**RLE:** i=0; while i<len(s): j=i; while j<len(s) and s[j]==s[i]: j+=1; res.append(f'{s[i]}{j-i}'); i=j. **Decode:** Expand char+count. **Why:** Compression. **Production:** Handle single chars (A1 vs A).
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