C++ Program for Staircase Problem

July 2, 2020

Cpp program for Staircase problem

Staircase Problem

Staircase Problem is a simple array manipulation problem, which can be solved using the concept of recursion and fibonacci series. This problem was also asked as a sample problem in TCS CodeVita Season 9 coding competition. This competition is organized by TCS every year in search of World’s Best Coders.

All TCS CodeVita Questions with Answers

Problem Description

There are n stairs, a person standing at the bottom wants to reach the top. The person can climb either 1 stair or 2 stairs at a time.

  • Count the number of ways, the person can reach the top.

C++ Code

#include  <iostream>
using namespace std;
 
int calc(int n);  
int count(int x);
 
int main ()
{
  int n ;
  cout<<("Enter number of stairs : ");
  cin>>n;
  cout<<("Number of ways = %d", count(n));
 
  return 0;
}
int count(int x)
{
	return calc(x + 1);
}
int calc(int n)
{
   if (n <= 1)
  	return n;
   return calc(n-1) + calc(n-2);
}
Output
Enter number of stairs : 5
8

Staircase Problem in Other Coding Languages

Python

To find the solution of Staircase problem in Python Programming language click on the button below:

 

Python

C

To find the solution of Staircase  problem in C Programming language click on the button below:

 

C

Java

To find the solution of Staircase  problem in Java Programming language click on the button below:

 

Java

One comment on “C++ Program for Staircase Problem”


  • Mahesh

    #include
    using namespace std;

    int main(){
    int n; cin >> n;
    int dp[n+1]{0};
    dp[0] = 0;
    dp[1] = 1;
    dp[2] = 2;
    for(int i=3; i<=n; i++){
    dp[i] += dp[i-1];
    dp[i] += dp[i-2];
    }
    cout << dp[n];
    }