Staircase | HackerRank Solution

Hello coders, today we are going to solve Staircase HackerRank Solution which is a Part of Problem Solving Series.

Staircase

Contents

Task

Staircase detail

This is a staircase of size n = 4:

   #
  ##
 ###
####

Its base and height are both equal to n. It is drawn using # symbols and spaces. The last line is not preceded by any spaces.

Write a program that prints a staircase of size n.

Function Description

Complete the staircase function in the editor below.

staircase has the following parameter(s):

  • int n: an integer

Print

Print a staircase as described above.

Input Format

A single integer, n, denoting the size of the staircase.

Constraints

  • 0 < n <= 100

Output Format

Print a staircase of size n using # symbols and spaces.

Note: The last line must have 0 spaces in it.

Sample Input

6 

Sample Output

     #
    ##
   ###
  ####
 #####
######

Explanation

The staircase is right-aligned, composed of # symbols and spaces, and has a height and width of n = 6.

Solution – Staircase

C++

#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);

/*
 * Complete the 'staircase' function below.
 *
 * The function accepts INTEGER n as parameter.
 */

void staircase(int n) {
    for(int i=0;i<n;i++) {
        cout << setfill(' ') << setw(n-(i+1)) << "";
        cout << setfill('#') << setw(i+1) << '#'<< endl;
    }

}

int main()
{
    string n_temp;
    getline(cin, n_temp);

    int n = stoi(ltrim(rtrim(n_temp)));

    staircase(n);

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}

Python

#!/bin/python3

import math
import os
import random
import re
import sys


def staircase(n):
    # Write your code here
    for i in range(1, n + 1):
        print(f'{"#"*i:>{n}}')

if __name__ == '__main__':
    n = int(input().strip())

    staircase(n)

Disclaimer: The above Problem (Staircase) is generated by Hacker Rank but the Solution is Provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.

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