My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言,一部分问题支持Java语言。近乎所有问题都会提供多个算
Leetcode Ugly Number II Write a program to find then-th ugly number. Ugly numbers are positive numbers whose prime factors only include2, 3, 5. For example,1, 2, 3, 4, 5, 6, 8, 9, 10, 12is the sequence of the first10ugly numbers. Note that1is typically treated as an ugly nu...
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https://leetcode.com/problems/linked-list-cycle-ii/solution/ Algorithm First off, we can easily show that the constraints of the problem imply that a cycle must exist. Because each number in nums is between 11 and nn, it will necessarily point to an index that exists. Therefore, the list...
package leetcode import ( "math" "sort" ) func numSquarefulPerms(A []int) int { if len(A) == 0 { return 0 } used, p, res := make([]bool, len(A)), []int{}, [][]int{} sort.Ints(A) // 这里是去重的关键逻辑 generatePermutation996(A, 0, p, &res, &used) return len...
Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", "af", "bd", "be", "bf", "cd", "ce", "cf"]. ...
传送门:750. Number Of Corner Rectangles Problem: Given a grid where each entry is only 0 or 1, find the number of corner rectangles. A corner rectangle is 4 distinct 1s on the grid that form an axis-aligned rectangle. Note that only the corners need to have the value 1. Also, all ...
1921-eliminate-maximum-number-of-monsters.cpp 1929-concatenation-of-array.cpp 1930-unique-length-3-palindromic-subsequences.cpp 1958-check-if-move-is-legal.cpp 1963-minimum-number-of-swaps-to-make-the-string-balanced.cpp 1968-array-with-elements-not-equal-to-average-of-neighbors.cpp 1980-find-...
链接:https://leetcode.cn/problems/letter-combinations-of-a-phone-number 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 思路一 - backtracking 题意是给一个 string,里面是数字,请返回所有可能的字母组合。这是典型的 backtracking 回溯类的题目,一定要会。回溯类的题目一般都是带着一个...
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