之后我们得到字符串 "aaca",其中又只有 "aa" 可以执行重复项删除操作,所以最后的字符串为 "ca"。 提示: 1 <= S.length <= 20000 S 仅由小写英文字母组成。 来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string python # 1047.删除所有相邻的重复字符 cl...
这道题是之前那道Remove All Adjacent Duplicates In String的拓展,那道题只是让移除相邻的相同字母,而这道题让移除连续k个相同的字母,规则都一样,移除后的空位不保留,断开的位置重新连接,则有可能继续生成可以移除的连续字母。最直接暴力的解法就是多次扫描,每次都移除连续k个字母,然后剩下的字母组成新的字符串,...
Can you solve this real interview question? Remove All Adjacent Duplicates in String II - You are given a string s and an integer k, a k duplicate removal consists of choosing k adjacent and equal letters from s and removing them, causing the left and th
LeetCode 1047. Remove All Adjacent Duplicates In String 原题链接在这里:https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string/ 题目: Given a stringSof lowercase letters, aduplicate removalconsists of choosing two adjacent and equal letters, and removing them. We repeatedly make dup...
【Leetcode_easy】1047. Remove All Adjacent Duplicates In String,problem1047.RemoveAllAdjacentDuplicatesInString参考1.Leetcode_easy_1047.RemoveAllAdjacentDuplicatesInString;完
1 <= S.length <= 20000 Sconsists only of English lowercase letters. 这题在LeetCode上是easy. 我自己做下来,也确实觉得思路不难想到,标位easy不为过。不过,虽然为easy,但我个人挺喜欢它的。 突破口 当从前往后扫描字符串时,我们需要看后面的字符是否和当前扫描到的字符是否相等,如果相等,则删除前一个字符...
Can you solve this real interview question? Remove Linked List Elements - Given the head of a linked list and an integer val, remove all the nodes of the linked list that has Node.val == val, and return the new head. Example 1: [https://assets.leetc
83. Remove Duplicates from Sorted List Given a sorted linked list, delete all duplicates such that each element appear onlyonce. Example 1: Input:1->1->2Output:1->2 Example 2: Input:1->1->2->3->3Output:1->2->3 思路: 这一题和26题移除数组中重复的元素一样都是去重,只不过这里的数...
classSolution:defremoveDuplicates(self,s:str,k:int)->str:num_st=[]cnt_st=[]foriinrange(len(s)):ifnotnum_stornum_st[-1]!=s[i]:num_st.append(s[i])cnt_st.append(1)else:cnt_st[-1]+=1ifcnt_st[-1]==k:cnt_st.pop()num_st.pop()return''.join([num_st[i]*cnt_st[i]for...
LeetCode 中关于括号的题目还是比较多的,比如 Valid Parentheses,Valid Parenthesis String,Remove Invalid Parentheses,和 Longest Valid Parentheses 等。大多都是考察如何判断一个括号字符串是否合法,所谓的合法,大致就是左右括号个数要相同,每个右括号前面必须要有对应的左括号,一个比较简单的判断方法就是用一个变量 ...