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原题链接在这里：https://leetcode.com/problems/android-unlock-patterns/description/ 题目： Given an Android 3x3 key lock screen and two integers m and n, where 1 阅读全文
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原题链接在这里：https://leetcode.com/problems/integer-break/description/ 题目： Given a positive integer n, break it into the sum of at least two positive intege 阅读全文
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原题链接在这里：https://leetcode.com/problems/count-numbers-with-unique-digits/description/ 题目： Given a non-negative integer n, count all numbers with unique 阅读全文
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原题链接在这里：https://leetcode.com/problems/palindromic-substrings/description/ 题目： Given a string, your task is to count how many palindromic substrings in 阅读全文
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原题链接在这里：https://leetcode.com/problems/out-of-boundary-paths/description/ 题目： There is an m by n grid with a ball. Given the start coordinate (i,j) of 阅读全文
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原题链接在这里：https://leetcode.com/problems/is-subsequence/description/ 题目： Given a string s and a string t, check if s is subsequence of t. You may assume 阅读全文