staircase.cpp

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main()
{	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		for(int j=n;j>i;j--)
		{
			cout<<" ";
		}
		for(int k=1;k<=i;k++)
		{
		cout<<"#";
	}
	cout<<endl;
	}
 return 0;
}