Can you solve this real interview question? Smallest Subsequence of Distinct Characters - Given a string s, return the lexicographically smallest subsequence of s that contains all the distinct characters of s exactly once. Example 1: Input: s = "b
Leetcode-5086 Smallest Subsequence of Distinct Characters(不同字符的最小子序列) 1#define_for(i,a,b) for(int i = (a);i < b;i ++)2classSolution3{4public:5stringsmallestSubsequence(stringtext)6{7intvis[26];8deque<char>deque1;9map<char,int>map1;1011deque1.clear();12map1.clear();1...
Return the lexicographically smallest subsequence oftextthat contains all the distinct characters oftextexactly once. Example 1: Input:"cdadabcc" Output:"adbc" Example 2: Input:"abcd" Output:"abcd" Example 3: Input:"ecbacba" Output:"eacb" Example 4: Input:"leetcode" Output:"letcod" Note:...
【LeetCode】Longest Substring with At Most Two Distinct Characters 思路:通用思路是用map维护滑动窗口,但是这里只涉及两个字符可以直接用变量表示,实际上跟904. Fruit Into Baskets同样 可以用right来记录当前序列中最后一次出现不同于当前字符的位置,这样当遇到跟前一个不同的字符时就可以跟right来比较从而更新ans...
【LeetCode】Longest Substring with At Most Two Distinct Characters 思路:通用思路是用map维护滑动窗口,但是这里只涉及两个字符可以直接用变量表示,实际上跟904. Fruit Into Baskets同样 可以用right来记录当前序列中最后一次出现不同于当前字符的位置,这样当遇到跟前一个不同的字符时就可以跟right来比较从而更新ans...
Description Return the lexicographically smallest subsequence of s that contains all the distinct characters of s exactly once. Note: This question is the same as 316: https://leetcode.com/problems/remove-duplicate-letters/ Example 1: Input: s = "bcabc" ...
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Recall the problem of finding the number of inversions. As in the course, we are given a sequence of n numbers a 1 ,··· ,a n , which we assume are all distinct, and we difine an i... LeetCode - Find the Duplicate Number ...
1081 Smallest Subsequence of Distinct Characters 不同字符的最小子序列 Description:Given a string ...
返回字符串text中按字典序排列最小的子序列,该子序列包含text中所有不同字符一次。 示例1: 输入:"cdadabcc" 输出:"adbc" 示例2: 输入:"abcd" 输出:"abcd" 示例3: 输入:"ecbacba" 输出:"eacb" 示例4: 输入:"leetcode" 输出:"letcod" 提示: ...