4/01/2017

Hackerrank Solution For Day 7: Arrays

Problem:- Write a Hackerrank Solution For Day 7: Arrays or Hacker Rank Solution Program In C++ For " Day 7: Arrays " or Hackerrank 30 days of code Java Solution: Day 7: Arrays solution or Hackerrank solution for 30 Days of Code Challenges.

Logic:- This is a very simple problem, here we need to only reverse the array and print the element of the array. As we know that array index starts with zero to n-1. here we just reverse the array by first print the array last index than second last index like n, n-1, n-2,..................... up to (greater or equal) 0 (Zero),

Example:- suppose array with 5 elements is 10, 20, 30, 40, 50 and index of the array is 0, 1, 2, 3, 4 so first print index 4 and element 50 then index 3 and element 40 and so on up to index 0 and element 10. Check the below picture its shows how exactly array is printing the element in reverse order.


Hacker rank Solution For Day 7: Arrays


All solution provided here are in C++ (CPP) if you want these solutions in C, and Java comments below or sends a mail with your query like " day n solution in C / C++ / Java. If you want to 30 days solution (All previous solution from day 0 ) from Day 0 please check the below link. You can also find more program in below of this post. Check the below solution with the full explanation (explanation in simple language).


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Solution:-

#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <unordered_map>

using namespace std;

int main()
{

 int n;
 cin >> n;

 vector<int> arr(n);

 for(int arr_i = 0;arr_i < n;arr_i++)
{
       cin >> arr[arr_i];
}

for(int arr_i = n-1;arr_i >= 0;arr_i--)
{
       cout << arr[arr_i]<<" ";
}
    return 0;
}

Output:-

Hackerrank Solution For Day 7: Arrays output


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