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1.reshape reshape is reshaping. Three commonly used expressions are as follows: numpy.arange(n).reshape(a, b) # n natural numbers are generated in turn and displayed in the form of an array of rows a and columns b numpy.arange(a,b,c) # Starting from the number a, the step is c, and ending at b, the array is generated numpy.ara ...

Counting Towers Main idea of the title: Build a n × 2 n \times 2 n × The rectangle of 2 can only be constructed with a rectangle. Ask how many different options there are. Solution: The division status is whe ...

1. The concept of sorting Sorting: the so-called sorting is the operation of arranging a series of records incrementally or decrementally according to the size of one or some keywords. Stability: in the original sequence, r[i]=r[j], and r[i] is before r[j], but in the sorted sequence, r[i] is still before r[j], then this sorting algorithm ...

introduction I'm trying to write a blog for the first time. I hope you officials will be more tolerant If there are mistakes, I hope you can put them forward. I will correct them in time. Thank you At his best age, he found his future goal There is still one year to struggle and brush questions. Go to interview and practice next year. Come ...

1. Bubble sorting Average time complexity: O(n^2) Worst time complexity: O(n^2) Space complexity: O(1) Stable: Yes Principle: it repeatedly visits the sequence to be sorted, compares two elements at a time, and exchanges them if they are in the wrong order. The work of visiting the sequence is repeated until there is no need to exchange, that i ...

2021 Blue Bridge Cup group B national tournament preface Because of the power failure in the school, we almost went to the Internet cafe to play the Blue Bridge Cup, but this invigilation method is too outrageous. If we want to cheat, it is easy. Now we are wondering whether we will lose the national award because of this poor invigilation me ...

13. Filter false values in the arrayRemove all false values from the arrayFalse values in JavaScript include false, null, 0, "", undefined and NaN.Tip: consider converting each value to a boolean.Input: bouncer([7, "ate", "", false, 9])Output: [7, "ate", 9]Solution 1:function bouncer(arr) { let temp = [ ...

It is said that everything is difficult at the beginning, so I want to find a simple topic to write my first solution. My growth starts from now on and will not stop. Title: you are trapped in a 3D dungeon and need to find the fastest way out! Dungeons consist of unit cubes that may or may not be filled with rock. It takes one minute to move a ...

Time series analysis - 23 DTW (time series similarity measurement algorithm) Preliminary study on DTW brief introduction In time series analysis, DTW(Dynamic Time Warping) is an algorithm used to detect the similarity of two time series, which is usually represented by a distance. For example, the following two sequences, ...

Algorithm - stack and queue: connected to rain Give a row of columns with width of 1 and height of n, and calculate the area that can receive rainwater. Train of thought analysis: Method 1: using the double pointer method, calculate by column. The first column and the last column do not receive rainwater. Because the width is 1, the area of ...