一、题目要求![](https://img-blog.csdnimg.cn/89b6d5d03b0948dda69de89881970850.png)
二、代码
#include <iostream>
using namespace std;
int main()
{
string a;
cin >> a;
cout << " "+a+"\n";
cout << " "+a+a+a+"\n";
cout << a+a+a+a+a+"\n";
return 0;
}
#include <iostream>
using namespace std;
int main()
{
string a;
cin >> a;
cout << " "+a+"\n";
cout << " "+a+a+a+"\n";
cout << a+a+a+a+a+"\n";
return 0;
}