Diamond_pattern

#include <iostream>
using namespace std;
 
int main() {
	// your code goes here
	int n,i,j,k;
	cin>>n;
	for( i=1;i<=n;i++){
		for( j=1;j<=n-i;j++)
			cout<<" ";
 
		for( k=1;k<=i*2-1;k++)
			cout<<"*";
 
		cout<<endl;
	}
	for( i=n;i>=1;i--){
		for( j=1;j<=n-i;j++)
			cout<<" ";
 
		for( k=1;k<=i*2-1;k++)
			cout<<"*";
 
		cout<<endl;
	}
 
	return 0;
}