网上的代码:https://discuss.leetcode.com/topic/65279/easy-o-n-java-solution-using-stack,最后几步指针没有看懂,使用stack也就是为了先计算靠右的数字,没有看懂的部分可可以用字符串来实现
Description You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two numbers do not contain any leading...
第四章 LeetCode 题解 0001~0099 0001. Two Sum 0002. Add Two Numbers 0003. Longest Substring Without Repeating Characters 0004. Median of Two Sorted Arrays 0005. Longest Palindromic Substring 0006. Zig Zag Conversion 0007. Reverse Integer 0008. String to Integer Atoi 0009. Palindrome Number 0011...
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input:(2 -> 4 -> 3) + (5 -> 6 -> 4) Output:7 -> 0 -> 8 考查...
java.lang.UnsupportedOperationException 解决方法 今天在写leetcode的算法时遇到了一个问题。先上代码: 报错: 然后在remove 方法这一行报出java.lang.UnsupportedOperationException,这就很费解,似乎从来没有遇见过。 原因: 上述代码中从头到位都是 List 因为实体中的也是声明的是List,没有一个地方是Ar...java...
0004-median-of-two-sorted-arrays.py 0005-longest-palindromic-substring.py 0007-reverse-integer.py 0010-regular-expression-matching.py 0011-container-with-most-water.py 0012-integer-to-roman.py 0013-roman-to-integer.py 0014-longest-common-prefix.py 0015-3sum.py 0017-lette...
LeetCode之Add Digits 1、题目 Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. For example: Given num = 38, the process is like: 3 + 8 = 11, 1 + 1 = 2. Since 2 has only one digit, return it....
0977-Squares-of-a-Sorted-Arrays 0978-Longest-Turbulent-Subarray 0979-Distribute-Coins-in-Binary-Tree 0980-Unique-Paths-III 0981-Time-Based-Key-Value-Store 0982-Triples-with-Bitwise-AND-Equal-To-Zero 0983-Minimum-Cost-For-Tickets 0984-String-Without-AAA-or-BBB 0985-Sum-of-Even-...
Optimized? 可以用Arrays.sort对words进行排序,结果就是字典序。然后利用一个辅助的Set来解? 或者利用Trie?
package leetcode func minAddToMakeValid(S string) int { if len(S) == 0 { return 0 } stack := make([]rune, 0) for _, v := range S { if v == '(' { stack = append(stack, v) } else if (v == ')') && len(stack) > 0 && stack[len(stack)-1] == '(' { sta...