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A - Pokemon Master Calem and Serena are pokemon masters. One day they decided to have a pokemon battle practice before Pokemon World Championships. Ea 阅读全文
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https://leetcode.com/problems/repeated-string-match/ Given two strings A and B, find the minimum number of times A has to be repeated such that B is a 阅读全文
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https://leetcode.com/problems/repeated-substring-pattern/ Given a non-empty string check if it can be constructed by taking a substring of it and appe 阅读全文
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https://leetcode.com/problems/add-to-array-form-of-integer/ For a non-negative integer X, the array-form of X is an array of its digits in left to rig 阅读全文
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https://leetcode.com/problems/add-strings/ Given two non-negative integers num1 and num2 represented as string, return the sum of num1 and num2. Note: 阅读全文
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Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 3 operations permitt 阅读全文