起因今天使用python生成的题目样例时，出现了字符串匹配有误的问题。经过长达几个小时的排查后，最终确定是python的换行回车的问题。

C++按位取反符号和原码反码补码的理解。

众所周知，虚拟机需要设置为桥接模式，才可以实现像真机一样接入网络，从而和宿主机实现相互通信。然而，在我将VirtualBox虚拟机设置为桥接模式后，却出现虚拟机和宿主机依旧无法相互ping通的问题。如下图所示。

快速查看解决方案错误提示Traceback (most recent call last):File “a.py”, line 9, in <module>v[i],w[i] = map(int,input().split())TypeError: ‘int’ object does not support item assignment错误代码N = 1010f = [[0] * N

[Error]no match for ‘operator<<’ (operand types are ‘std::basic_ostream’ and ‘plural’)先看一下可能引发此错误的代码#include<iostream>using namespace std;class plural{private:double s,x;public:plural(doub

[Error]no match for ‘operator<<’ (operand types are ‘std::basic_ostream’ and ‘plural’)先看一下可能引发此错误的代码#include<iostream>using namespace std;class plural{private:double s,x;public:plural(doub

快速查看解决方案错误提示Traceback (most recent call last):File “a.py”, line 9, in <module>v[i],w[i] = map(int,input().split())TypeError: ‘int’ object does not support item assignment错误代码N = 1010f = [[0] * N