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IP属地：华盛顿州
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leetcode-tree relevant
一个inorder traverse 的iteration： 先循环左边，左边循环完循环右边，但是右边的node也要循环他的左边，所以要把循环左...
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leetcode-12
Coin Change Boundary: There may be no possible change, so in this scenar...
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leetcode-11
House Robber [2,1,1,2] => 并不是每隔一个加一就是最佳最佳问题=>考虑DP=>思考循环的关联对于一个nums[i]: r...
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MAC OSX下opencv 4的静态库编译与连接/ compile and link opencv static library under OSX我！终于！成功在MAC下面把opencv4程序静态编译起来了！先上compile的命令：g++ -std=c++11 main.cpp prep...
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leetcode-Best Time to Buy and Sell Stock
Best Time to Buy and Sell Stock 其实也算是DP，每次的结果和前一次的结果比较 Best Time to Buy ...
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leetcode-9
Subsets Bit manipulation and map can be useful aside from backtracking P...
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leetcode-8
Climbing Stairs Just Fibonacci. Dynamic Programming's space complexity c...
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Backtracking
Combination Sum Most basic backtracking. The idea of begin position is e...
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leetcode-day6
输入值是指针考虑是不是NULL， next是不是NULL输入值是数组考虑长度为0 Search a 2D Matrix II Instead o...