原创 LeetCode | 113. Path Sum II
題外話：又到了一月一度的coding time！ 題目： Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equal
2020-06-08 07:32:12
原创 LeetCode | 118. Pascal s Triangle
題目： Given a non-negative integer numRows, generate the first numRows of Pascal's triangle. In Pascal's triangle, eac
2020-06-08 07:32:12
原创 LeetCode | 115. Distinct Subsequences
題目： Given a string S and a string T, count the number of distinct subsequences of S which equals T. A subsequence of
2020-06-08 07:32:12
原创 Pytorch | Pytorch框架中模型和數據的gpu和cpu模式：model.to(device), model.cuda(), model.cpu(), DataParallel
背景介紹 我們在使用Pytorch訓練時，模型和數據有可能加載在不同的設備上（gpu和cpu），在算梯度或者loss的時候，報錯信息類似如下： RuntimeError: Function AddBackward0 returned
2020-05-10 07:48:54
原创 LeetCode | 111. Minimum Depth of Binary Tree
題目： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path fro
2020-05-01 04:17:31
原创 LeetCode | 109. Convert Sorted List to Binary Search Tree
題目： Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. For
2020-05-01 04:17:31
原创 LeetCode | 112. Path Sum
題目： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values a
2020-05-01 04:17:31
原创 LeetCode | 108. Convert Sorted Array to Binary Search Tree
題目： Given an array where elements are sorted in ascending order, convert it to a height balanced BST. For this proble
2020-05-01 04:17:31
原创 Package | OpenCV C++ cv::Mat 數據類型type對應的輸出值
背景： 在使用OpenCV C++包時，通常需要訪問和修改cv::Mat的數據值。要做到點對點的處理，保證程序的正確性，需要先確定cv::Mat的數據類型type，以確定後續訪問cv::Mat數據的調用接口。 做法： 要確定cv:
2020-04-22 04:02:52
原创 Package | Windows10 CUDA10.2 JDK8 環境下安裝NVidia Visual Profiler（nvvp）安裝Bug筆記
背景 最近需要具體分析CUDA程序的GPU佔用情況。除了使用常見的clock、gettimeofday計時分析程序的效率之外，還可以使用nvidia推出的nvprof進行具體的GPU指令耗時分析，爲了方便分析，可以使用nvidia v
2020-02-27 11:04:15
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原创 LeetCode | 99. Recover Binary Search Tree
題目： Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structur
2020-02-24 21:02:38
原创 LeetCode | 100. Same Tree
題目： 第100題啦！新的一年，多多刷題呀~ Given two binary trees, write a function to check if they are the same or not. Two binary tr
2020-02-24 21:02:38
原创 LeetCode | 106. Construct Binary Tree from Inorder and Postorder Traversal
題目： Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates
2020-02-24 21:02:38
原创 C/C++ | ubuntu perf輔助分析程序瓶頸，查看程序佔用cpu情況
背景：在分析C/C++程序運行耗時的時候，我們通常可以簡單地分段打印時間去分析程序地佔用耗時。ubuntu環境下還有更直觀且實用的工具perf，performance analysis tool，即性能分析工具，可以在進程運行時，記錄
2020-02-24 21:02:38
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原创 LeetCode | 102. Binary Tree Level Order Traversal
題目： Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by lev
2020-02-24 21:02:38