keda UID:10033 李颢楷

luogu UID:1434281 lihaokai_juruo

hydr UID:64905 lihaokaii

libre UID:啊没有UID lihaokaii

梦熊 UID：5163 lihaokaii

vijos UID：171415 lihaokaii

#include<bits/stdc++.h>
#include<conio.h>
#include<windows.h>
using namespace std;
int main()
{
	unsigned long long s=0;
	while(1)
	{
		int b=rand()%16;
		if(b==0)system("color 0");
		if(b==1)system("color 1");
		if(b==2)system("color 2");
		if(b==3)system("color 3");
		if(b==4)system("color 4");
		if(b==5)system("color 5");
		if(b==6)system("color 6");
		if(b==7)system("color 7");
		if(b==8)system("color 8");
		if(b==9)system("color 9");
		if(b==10)system("color A");
		if(b==11)system("color B");
		if(b==12)system("color C");
		if(b==13)system("color D");
		if(b==14)system("color E");
		if(b==15)system("color F");
		s++;
		Sleep(s);
		cout<<s<<"\n";
	}
	return 0;
}