ДЗ #7 (две равные строки)

#include <iostream>
using namespace std;
int main()
{
    int a[3][3];
    for (int i = 0; i <3; i++)
        for (int j = 0; j <3; j++)
            cin >> a[i][j];
    cout << endl;
    cout << endl;
    bool b, q;
    b = false;
    for (int i = 0; i < 3 && !b; i++)
    {
        for (int k = 0; k < 3; k++)
        {
            if (i != k)
            {
                for (int j = 0; j < 3; j++)
                    if (a[i][j] == a[k][j])
                        b = true;
            }
        }
    }
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 3; j++)
            cout << a[i][j];
        cout << endl;
    }

    if (b) cout << "YEs";
    else cout << "Stupid boy";

    system("pause");
    return 0;
}