乐

#include <bits/stdc++.h>
using namespace std;
int main(){
int n;
cin>>n;
for(int i=1;i<=n;++i)
{
for(int k=1;k<=n-i;++k) cout<<" ";

	for(int j=1;j<=i*2-1;j++) cout<<"*";
	cout<<endl;
}

return 0;

}