编程题在这：

https://oj.since2018.top/contest/683698bea95163b2811eeaad

每道题目请参考以下格式提交程序：

#include<iostream>
using namespace std;
int main()
{
  cout << "A";
  return 0;
}

如果选 $B/C/D$ 将输出内容修改即可。

判断题请输出 $T/F$，参考：

#include<iostream>
using namespace std;
int main()
{
  cout << "T";
  return 0;
}

The contest is a flexible time contest. You need to complete the contest within a specified time after you attended.