фаня

#include <iostream>
using namespace std;

int main()
{
    const int n = 3;
    int mass[n][n] = { { 1,2,3 },{ 4,5,6 },{ 1,2,3 } };
    bool s = true, m = false;
    for (int i = 0; i < n && !m; i++)
    {
        for (int k = i + 1; k < n && !m; k++)
        {
            s = true;
            for (int j = 0; j < n&&s; j++)
                if (mass[i][j] != mass[k][j]) s = false;
        }
        m = s;
    }

    if (m) cout << "stroki sovpadayut";
    else cout << "stroki ne sovpadayut";
    system("pause");
    return 0;
}