Linux命令：

echo <内容>

输出内容，与C/C++中的printf类似

简介：

由于QT Desginer 在创建窗体项目时会自动生成扩展名为.ui的文件，该文件需要转换为.py文件后才能被Python所识别，所以需要为QT Designer与Pycharm开发工具进行配置。

简介：

PyQt5是一套Python绑定Digia QT5应用的框架。作为Python中的一个重要模块，它可用于Python 2和3。Qt库是最强大的GUI库之一。

Foregone Solution (6pts, 10pts, 1pts)

Problem

Someone just won the Code Jam lottery, and we owe them N jamcoins! However, when we tried to print out an oversized check, we encountered a problem. The value of N, which is an integer, includes at least one digit that is a 4… and the 4 key on the keyboard of our oversized check printer is broken.

Fortunately, we have a workaround: we will send our winner two checks for positive integer amounts A and B, such that neither A nor B contains any digit that is a 4, and A + B = N. Please help us find any pair of values A and B that satisfy these conditions.

Description

由于外国间谍的大量渗入，国家安全正处于高度的危机之中。如果A间谍手中掌握着关于B间谍的犯罪证据，则称A可以揭发B。有些间谍收受贿赂，只要给他们一定数量的美元，他们就愿意交出手中掌握的全部情报。所以，如果