LeetCode 386. Lexicographical Numbers 程序员木子 香港浸会大学 数据分析与人工智能硕士在读 来自专栏 · LeetCode Description Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm...
1publicclassSolution {2publicList<Integer> lexicalOrder(intn) {3ArrayList<Integer> res =newArrayList<Integer>();4for(inti=1; i<=9; i++) {5helper(res, i, n);6}7returnres;8}910publicvoidhelper(ArrayList<Integer> res,intcur,intn) {11if(cur > n)return;12res.add(cur);13for(inti=...
Can you solve this real interview question? Lexicographical Numbers - Given an integer n, return all the numbers in the range [1, n] sorted in lexicographical order. You must write an algorithm that runs in O(n) time and uses O(1) extra space. Exam
Given an integer n, return 1 - n in lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]. Please optimize your algorithm to use less time and space. The input size may be as large as 5,000,000. Java算法实现 publicclassSolution{publicList<Int...
The numbers are arranged in tree structure: 1 10 11 12 ... 19 100 101 ... 109 | 110 111 ... 119 | ... We just use DFS to go through the tree. Solution: 1publicclassSolution {2publicList<Integer> lexicalOrder(intn) {3List<Integer> resList =newArrayList<Integer>();4for(inti ...
helper(cur*10+i, n, res); }elsebreak; } } }; 参考资料: https://discuss.leetcode.com/topic/55131/ac-240ms-c-solution https://discuss.leetcode.com/topic/55091/java-recursion-backtracking-with-explanation LeetCode All in One 题目讲解汇总(持续更新中...)...
// LeetCode 2020 medium #524 // 386. Lexicographical Numbers // Runtime: 12 ms, faster than 99.78% of C++ online submissions for Lexicographical Numbers. // Memory Usage: 10.5 MB, less than 100.00% of C++ online submissions for Lexicographical Numbers. // Time Complexity: O(n). // Sp...
https://leetcode.com/problems/lexicographical-numbers/ public class Solution { public List<Integer> lexicalOrder(int n) { List<Integer> ret = new ArrayList<Integer>(); int cur = 1; ret.add(cur); while (cur > 0) { if (cur * 10 <= n) { cur *= 10; ret.add(cur); continue; ...
LeetCode Lexicographical Numbers 原题链接在这里:https://leetcode.com/problems/lexicographical-numbers/description/ 题目: Given an integern, return 1 -nin lexicographical order. For example, given 13, return: [1,10,11,12,13,2,3,4,5,6,7,8,9]....
lexicographical-numbers https://leetcode.com/problems/lexicographical-numbers/ public class Solution { public List<Integer> lexicalOrder(int n) { List<Integer> ret = new ArrayList<Integer>(); int cur = 1; ret.add(cur); while (cur > 0) {...