/*** 找到有环链表的入口* @param head* @return*/publicstatic<T> ListNode<T>findEntranceInLoopList(ListNode<T> head){ListNode<T> slowPointer, fastPointer;//使用快慢指针,慢指针每次向前一步,快指针每次两步boolean isLoop =false;slowPointer = fastPointer = head;while(fastPointer != null && fa...
If the node is found, remove it by pointingparent−>nexttoparent−>nexttocur->next, and free the $cur node. Time complexity is O((len - n) * n), where $len is the length of the linked list. On average the complexity is O(len ^ 2). Space complexity is O(1). Accepted co...
1.1 Remove Duplicates from Sorted Array 1.2 Remove Duplicates from Sorted Array II 1.3 Search in Rotated Sorted Array II 1.4 Median of Two Sorted Arrays 1.5 Longest Consecutive Sequence 1.6 Two Sum 1.7 Valid Sudoku 1.8 Trapping Rain Water 1.9 Swap Nodes in Pairs 1.10 Reverse Nodes in k-Group ...
// Solution 1: Since we're free to make the shift by any offset, it's OK to shift th string so that all the initials of the strings are shifted to a certain character like 'a' or 'z'. In this way, all shifted strings become one. Group them in this way. 代码1 //Code 1 250...
You will be given the number n and a list of undirected edges (each edge is a pair of labels). You can assume that no duplicate edges will appear in edges. Since all edges are undirected, [0, 1] is the same as [1, 0] and thus will not appear together in...
Linked List Have you met this question in a real interview? Yes No Discuss 思路:和Remove Duplicates from Sorted List一样,双指针,head指向要插入node的前一个node,p指向当前处理的node。 如何判断是否重复呢,判断p和p->next是否一样,若一样,则不插入,不一样就要插入,但是这里忽略了NULL的处理,如果p->...
546.Remove-Boxes (H+) 1340.Jump-Game-V (M+) 1815.Maximum-Number-of-Groups-Getting-Fresh-Donuts (H-) 2741.Special-Permutations (M+) 2746.Decremental-String-Concatenation (H-) 3213.Construct-String-with-Minimum-Cost (H-) hidden matrix 489.Robot-Room-Cleaner (H) 1778.Shortest-Path-in-a...
0027 Remove Element Go 52.0% Easy 0028 Find the Index of the First Occurrence in a String Go 37.4% Medium 0029 Divide Two Integers Go 17.4% Medium 0030 Substring with Concatenation of All Words Go 30.9% Hard 0031 Next Permutation Go 37.1% Medium 0032 Longest Valid Parentheses Go 32.7...
int loop = itrv; while (cur != null && loop > 0) { cur = cur.next; loop--; } if (loop > 0) break; // 无 l2 // 1.2 找到合并链表的 l1 头节点 ListNode l2 = cur; loop = itrv; while (cur != null && loop > 0) { ...
Water can only flow in four directions (up, down, left, or right) from a cell to another one with height equal or lower. Find the list of grid coordinates where water can flow to both the Pacific and Atlantic ocean. Note: The order of returned grid coordinates does not matter. Both...