Given two non-negative integers num1 and num2 represented as string, return the sum of num1 and num2.
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The length of both num1 and num2 is < 5100.
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Both num1 and num2 contains only digits 0-9.
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Both num1 and num2 does not contain any leading zero.
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You must not use any built-in BigInteger library or convert the inputs to integer directly.
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Accepted 93,412
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Submissions 214,402
- Runtime: 2 ms, faster than 98.31% of Java online submissions for Add Strings.
- Memory Usage: 35.1 MB, less than 100.00% of Java online submissions for Add Strings. Next challenges: