一.解法 https://leetcode-cn.com/problems/bulls-and-cows/ 要點(diǎn):hashmapPython,C++,Java都...
一.解法 https://leetcode-cn.com/problems/nim-game/ 要點(diǎn):數(shù)學(xué),動(dòng)態(tài)規(guī)劃一開(kāi)始想到用動(dòng)態(tài)規(guī)劃做,見(jiàn)java代碼,思路...
一.解法 https://leetcode-cn.com/problems/word-pattern/ 要點(diǎn):hashmapPython,C++,Java都用了相同...
一.解法 https://leetcode-cn.com/problems/move-zeroes/ 要點(diǎn):雙指針C++用了從后往前找0冒泡排序的方法,效率較低Pyth...
一.解法 https://leetcode-cn.com/problems/first-bad-version/ 要點(diǎn):二分法Python,C++,Java都用了二分法...
一.解法 https://leetcode-cn.com/problems/missing-number/要點(diǎn):數(shù)學(xué),hashmap,排序C++用了排序的方法,遍歷一遍找到0...
一.解法 https://leetcode-cn.com/problems/ugly-number/要點(diǎn):數(shù)學(xué)丑數(shù)除去所有的2,所有的3,所有的5必為一用三個(gè)while循環(huán)即...
一.解法 https://leetcode-cn.com/problems/add-digits/要點(diǎn):數(shù)學(xué)這道題可以用循環(huán)方法解決,將給定的數(shù)字的各個(gè)位相加得到新的數(shù)字,一...
近年來(lái),網(wǎng)易云音樂(lè)作為一匹黑馬迅速在移動(dòng)音樂(lè)app占據(jù)市場(chǎng),2016年用戶量就突破了2億,而這與它優(yōu)質(zhì)的推薦系統(tǒng)必不可分。 當(dāng)今,在這個(gè)信息爆炸的時(shí)代,我們可以接觸到龐大浩瀚...
一.解法 https://leetcode-cn.com/problems/binary-tree-paths/要點(diǎn):遞歸,DFSPython,C++,Java都用了遞歸的方...
一.解法 https://leetcode-cn.com/problems/valid-anagram/要點(diǎn):排序,哈希表Python用了排序法,s 和 t 的長(zhǎng)度不同提前返...
一.解法 https://leetcode-cn.com/problems/delete-node-in-a-linked-list/要點(diǎn):鏈表這題說(shuō)的是在不知道前一個(gè)節(jié)點(diǎn)的...
一.解法 https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-search-tree/要點(diǎn)...
一.解法 https://leetcode-cn.com/problems/palindrome-linked-list/要點(diǎn):快慢指針,翻轉(zhuǎn)鏈表Python因?yàn)榍衅奖?,?..
一.解法 https://leetcode-cn.com/problems/implement-queue-using-stacks/要點(diǎn):輔助棧Python,C++,Jav...
一.解法 https://leetcode-cn.com/problems/power-of-two/要點(diǎn):位運(yùn)算一開(kāi)始用C++,想法是不斷除以二直到1,同時(shí)每次取2的余數(shù),...
一.解法 https://leetcode-cn.com/problems/invert-binary-tree/要點(diǎn):遞歸,樹Python,C++,Java都用了二叉樹遞歸...
一.解法 https://leetcode-cn.com/problems/implement-stack-using-queues/要點(diǎn):隊(duì)列Python,C++,Java...
一.解法 https://leetcode-cn.com/problems/contains-duplicate-ii/要點(diǎn):hashset,滑動(dòng)窗口和218題類似,但要注意...