0-1_pattern.cpp

#include<iostream>
using namespace std;

int main()
{
    int n;
    cin>>n;

    for(int row=1;row<=n;row++)
    {
        for(int col=1;col<=row;col++)
        {
if((row+col)%2==0)
{
    cout<<"1";
}
else{
    cout<<"0";
}
        }
        cout<<endl;
    }
    return 0;

}