0-1 Pattern.cpp

#include <iostream>
using namespace std;

int main()
{
   int n;
   cin>>n;
   for(int i=1;i<=n;i++){
       for(int j=1;j<=i;j++){
           if((i+j)%2==0){
               cout<<"1 ";
           }
           else{
               cout<<"0 ";
           }
        }
       cout<<endl;
   }
   return 0;
}

Input:
5

Output:
1 
0 1 
1 0 1 
0 1 0 1 
1 0 1 0 1