# Geeksforgeeks Solution For " 1's Complement "

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Problem :- Given an N bit binary number, find the 1's complement of the number. The ones' complement of a binary number is defined as the value obtained by inverting all the bits in the binary representation of the number (swapping 0s for 1s and vice versa).

Input:

The first line of input takes the number of test cases, T. Then T test cases follow. The first line of each test case takes the number of bits, N. The second line of each test case takes N space separated integers denoting the N bits of the binary number.

Output:

Print the 1's complement for each test case in a new line.

Solution :-

#include <bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin>>t;
while(t--)
{
int n,i,j,sum,res=0;
cin>>n;
int arr[n];
for(i=0;i<n;i++)
cin>>arr[i];
for(i=0;i<n;i++)
{
if(arr[i]==1)
cout<<"0 ";
else
cout<<"1 ";
}
cout<<endl;
}
return 0;

}

Output:-

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#### post written by: Ghanendra Yadav

Hi, I’m Ghanendra Yadav, SEO Expert, Professional Blogger, Programmer, and UI Developer. Get a Solution of More Than 500+ Programming Problems, and Practice All Programs in C, C++, and Java Languages. Get a Competitive Website Solution also Ie. Hackerrank Solutions and Geeksforgeeks Solutions. If You Are Interested to Learn a C Programming Language and You Don't Have Experience in Any Programming, You Should Start with a C Programming Language, Read: List of Format Specifiers in C.