A company is planning to interview 2n people. Given the array costs where costs[i] = [aCosti, bCosti], the cost of flying the ith person to city a is aCosti, and the cost of flying the ith person to city b is bCosti.
You are given an array people where people[i] is the weight of the ith person, and an infinite number of boats where each boat can carry a maximum weight of limit. Each boat carries at most two people at the same time, provided the sum of the weight of those people is at most limit.
There is a broken calculator that has the integer startValue on its display initially. In one operation, you can:
The numeric value of a lowercase character is defined as its position (1-indexed) in the alphabet, so the numeric value of a is 1, the numeric value of b is 2, the numeric value of c is 3, and so on.
You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part.
In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the ith domino. (A domino is a tile with two numbers from 1 to 6 – one on each half of the tile.)
Given a string s, remove duplicate letters so that every letter appears once and only once. You must make sure your result is the smallest in lexicographical order among all possible results.
Given a balanced parentheses string s, return the score of the string.
我一直以來都希望能夠保存 PyTorch 訓練模型時所使用的優化器（optimizer），以便能夠在模型結束訓練之後，繼續往下訓練；一般來說，如果是要做遷移學習、微調模型（fine-tune），那麼並不需要特別將上一次訓練的優化器保存下來。
Read More »[PyTorch] 保存優化器（optimizer）來接續訓練模型
