Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping ...
經典的backtracking 回溯算法 的題目。當一個題目,存在各種滿足條件的組合,並且需要把它們全部列出來時,就可以考慮backtracking了。當然,backtracking在一定程度上屬於窮舉,所以當數據特別大的時候,不合適。而對於那些題目,可能就需要通過動態規划來完成。 這道題的思路很簡單,假設輸入的是 , 對應的是 abc , 對應的是 edf ,那么我們在遞歸時,先確定 對應的其 ...
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Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping ...
Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like ...
題目鏈接 Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like ...
原題地址:https://oj.leetcode.com/problems/letter-combinations-of-a-phone-number/ 題意: Given a digit string, return all possible letter combinations ...
題目: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like ...
題目描述 給定一個僅包含數字 2-9 的字符串,返回所有它能表示的字母組合。 給出數字到字母的映射如下(與電話按鍵相同)。注意 1 不對應任何字母。 示例: ...
Given a string containing digits from 2-9inclusive, return all possible letter combinations that the number could represent. A mapping of digit ...
題目鏈接 Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example, If n = 4 and k = 2, a solution ...