Skip to content
Programmingoneonone
Programmingoneonone
  • 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
Programmingoneonone

HackerEarth XOR subsequences problem solution

YASH PAL, 31 July 2024
In this HackerEarth XOR subsequences problem solution You are given an array A consisting of N integers. Your task is to find the longest subsequence S, such that XOR of any two elements in S is non-zero.
You are required to print the size of S(L) and the array of indices that are chosen for S. In case of multiple such arrays, choose the lexicographically smallest array.
HackerEarth XOR subsequences problem solution

HackerEarth XOR subsequences problem solution.

#include<bits/stdc++.h>
using namespace std;
#define FIO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define mod 1000000007
#define endl "n"
#define test ll t; cin>>t; while(t--)
typedef long long int ll;
int main() {
FIO;
test
{
ll n; cin>>n;
vector<ll>a(n);
map<ll,ll>mp;
vector<ll>ans;
for(int i=0;i<n;i++){
cin>>a[i];
mp[a[i]]++;
if(mp[a[i]]==1) ans.push_back(i+1);
}
cout<<ans.size()<<endl;
for(auto it:ans) cout<<it<<" ";
cout<<endl;
}
return 0;
}

Second solution

t = int(input())
while t > 0:
t -= 1
n = int(input())
s = set()
ans = []
i = 0
for x in map(int, input().split()):
i += 1
if x not in s:
s.add(x)
ans += [i]
print(len(ans))
print(*ans)
coding problems solutions

Post navigation

Previous post
Next post

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
  • YouTube
  • LinkedIn
  • Facebook
  • Pinterest
  • Instagram
©2025 Programmingoneonone | WordPress Theme by SuperbThemes