#include<bits/stdc++.h>//此为改编/转载
#include<windows.h>
#define t system
#define g cout
#define h cin
#define j endl
#define sleep Sleep
#define pos SetCursorPos
using namespace std;
int a;
int main(){
HWND hWnd = GetConsoleWindow();
ShowWindow(hWnd, SW_HIDE);
Beep(500,1000);
Sleep(100);
Beep(2000,100);
Sleep(100);
Beep(500,1000);
Sleep(100);
Beep(2000,100);
Sleep(100);
}
}