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I agree StringBuilder and StringBuffer [both amortized O(n)] have better perfomace than string concanation [O(n^2)]. I just didn't modify my solution because of laziness.
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Super Reduced String
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I agree StringBuilder and StringBuffer [both amortized O(n)] have better perfomace than string concanation [O(n^2)]. I just didn't modify my solution because of laziness.