0-1pattern.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;
}