3.longest substring without repeating
Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc&q...
王二的数字花园
钱塘江上潮信来，今日方知我是我
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93. Restore IP Address
Given a string containing only digits, restore it by returning all possible valid IP address combinations. Example: Input: "25525511135" Out...
语义分割中的度量标准
pixel accuracy (PA，像素精度)标记正确的像素占总像素的比例 PA=\frac{\sum_{i=1}^kp_{ii}}{\sum_{i=0}^k\sum_{j=0}^kp_{ij}}mean pixel accuracy (MPA, 均像素精度)计算每个类中被正确分类像素的比例，然...