一個inorder traverse 的iteration： 先循環(huán)左邊，左邊循環(huán)完循環(huán)右邊，但是右邊的node也要循環(huán)他的左邊，所以要把循環(huán)左邊的while循環(huán)和獲得右邊n...
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leetcode-tree relevant
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leetcode-12
Coin Change Boundary: There may be no possible change, so in this scenario, should chec...
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leetcode-11
House Robber [2,1,1,2] => 并不是每隔一個加一就是最佳最佳問題=>考慮DP=>思考循環(huán)的關(guān)聯(lián)對于一個nums[i]: rob, 那么至此得到的總價是 ...
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MAC OSX下opencv 4的靜態(tài)庫編譯與連接/ compile and link opencv static library under OSX我！終于！成功在MAC下面把opencv4程序靜態(tài)編譯起來了！先上compile的命令：g++ -std=c++11 main.cpp preprocess.cpp -fra...
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leetcode-Best Time to Buy and Sell Stock
Best Time to Buy and Sell Stock 其實也算是DP，每次的結(jié)果和前一次的結(jié)果比較 Best Time to Buy and Sell Stock ...
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leetcode-9
Subsets Bit manipulation and map can be useful aside from backtracking Path Sum Don't s...
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leetcode-8
Climbing Stairs Just Fibonacci. Dynamic Programming's space complexity can be optimized...
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Backtracking
Combination Sum Most basic backtracking. The idea of begin position is excellent, avoid...
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leetcode-day6
輸入值是指針考慮是不是NULL， next是不是NULL輸入值是數(shù)組考慮長度為0 Search a 2D Matrix II Instead of beginning wit...
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leetcode-day5
暑假一定要好好刷題-皿- 為了不996 Maximum Subarray Pay attention to boundary contidion. When initiali...
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leetcode-day2
Longest Substring Without Repeating Characters Insert postion for unsorted_set is deffe...
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leetcode-day3
Valid Parentheses Boundary Condition: consider just having left parenthese and right pa...
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leetcode-day1
Two Sum Brute Force: time O(n^2) space O(1) Hash Map: time O(n) space O(n) Add Two Numb...
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