Specialized Four-Digit Numbers HDU - 1197 Find and list all four-digit numbers in decimal notation that have the property that the sum of its four digits equ...

C. Minimize The Integer time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given a huge inte...

C. Vasya and Golden Ticket time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Recently Vasya found a ...

题目描述 因为151既是一个质数又是一个回文数(从左到右和从右到左是看一样的)，所以 151 是回文质数。

You have a large electronic screen which can display up to 998244353998244353 decimal digits. The digits are displayed in the same way as on different electroni...

Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 246913578, which ...

Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules:

Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules:

sklearn 数据集一览类型获取方式自带的小数据集sklearn.datasets.load_...在线下载的数据集sklearn.datasets.fetch_...计算机生成的数据集sklearn.datasets.make_...svmlight/libsvm格式的数据集sklearn.da......

1.创建数据集/矩阵【data.frame数据框、matrix矩阵、array数组】