Skip to content
Programming101
Programming101

Learn everything about programming

  • Home
  • CS Subjects
    • IoT – Internet of Things
    • Digital Communication
    • Human Values
  • Programming Tutorials
    • C Programming
    • Data structures and Algorithms
    • 100+ Java Programs
    • 100+ C Programs
  • HackerRank Solutions
    • HackerRank Algorithms Solutions
    • HackerRank C problems solutions
    • HackerRank C++ problems solutions
    • HackerRank Java problems solutions
    • HackerRank Python problems solutions
Programming101
Programming101

Learn everything about programming

HackerEarth A XOR value problem solution

YASH PAL, 31 July 2024
In this HackerEarth A XOR value problem solution You are given an array A consisting of N integer values. Find an integer K such that the value of the following function is minimized:
  • Sigma(i=1,i=N) (A[i] XOR K), XOR represents a bitwise XOR operation
If multiple such K exist, then print the minimum possible value of K.
HackerEarth A XOR value problem solution

HackerEarth A XOR value problem solution.

#include<bits/stdc++.h>
#define ll long long int
using namespace std;

void solve(){
int n;
cin >> n;
assert(1 <= n and n <= 100000);

ll a[n+1];
for(int i = 1 ; i <= n ; i++)
{
cin >> a[i];
assert((ll)1 <= a[i] and a[i] <= 1000000000000000000);
}

ll k = 0;
for(int i = 0 ; i < 60 ; i++)
{
ll vl = (1LL << i);
int cnt = 0;
for(int j = 1 ; j <= n ; j++)
{
if(vl & a[j])
{
cnt++;
}
}

int ncnt = n - cnt;

if(cnt > ncnt)
{
k += vl;
}
}

cout << k << endl;
}

int main(){
int t;
cin >> t;
assert(1 <= t and t <= 10);
while(t--){
solve();
}
}

Second solution

MAXB = 60
t = int(input())
while t > 0:
t -= 1
n = int(input())
a = list(map(int, input().split()))
cnt = [[0, 0] for _ in range(MAXB)]
for x in a:
for i in range(MAXB):
cnt[i][x >> i & 1] += 1
print(sum((cnt[i][0] < cnt[i][1]) << i for i in range(MAXB)))
coding problems solutions

Post navigation

Previous post
Next post
  • HackerRank Separate the Numbers solution
  • How AI Is Revolutionizing Personalized Learning in Schools
  • GTA 5 is the Game of the Year for 2024 and 2025
  • Hackerrank Day 5 loops 30 days of code solution
  • Hackerrank Day 6 Lets Review 30 days of code solution
How to download udemy paid courses for free

Pages

  • About US
  • Contact US
  • Privacy Policy

Programing Practice

  • C Programs
  • java Programs

HackerRank Solutions

  • C
  • C++
  • Java
  • Python
  • Algorithm

Other

  • Leetcode Solutions
  • Interview Preparation

Programming Tutorials

  • DSA
  • C

CS Subjects

  • Digital Communication
  • Human Values
  • Internet Of Things
©2025 Programming101 | WordPress Theme by SuperbThemes