alternate_square_pattern.cpp

#include<iostream>
using namespace std;

int main() {

    int n;
    cin>>n;

    for(int i=1; i<=n; i++) {
        if (i%2 == 0)
        {
            for(int j=5*i; j>5*(i-1); j--)
                cout<<j<<" ";
            cout<<endl;
        } else
        {
            for(int j=(5*(i-1))+1; j<=5*i; j++)
                cout<<j<<" ";
            cout<<endl;
        }
   
    }

    return 0;
}