Given two stringsRead More »LeetCode: 567-Permutation in String 解題紀錄s1ands2, returntrueifs2contains a permutation ofs1, orfalseotherwise. In other words, returntrueif one ofs1's permutations is the substring ofs2.
You are given two stringsRead More »LeetCode: 389-Find the Difference 解題紀錄sandt. Stringtis generated by random shuffling stringsand then add one more letter at a random position. Return the letter that was added tot.
Given two binary search treesRead More »LeetCode: 1305-All Elements in Two Binary Search Trees 解題紀錄root1androot2, return a list containing all the integers from both trees sorted in ascending order.
Given an array of integersRead More »LeetCode: 941-Valid Mountain Array 解題紀錄arr, returntrueif and only if it is a valid mountain array. Recall that arr is a mountain array if and only if:
We define the usage of capitals in a word to be right when one of the following cases holds:Read More »LeetCode: 520-Detect Capital 解題紀錄
You are given a 0-indexed integer arrayRead More »LeetCode: 2149-Rearrange Array Elements by Sign 解題紀錄numsof even length consisting of an equal number of positive and negative integers. You should rearrange the elements ofnumssuch that the modified array follows the given conditions:
