bacT7 SIII 2

#include <iostream>
using namespace std;
#define NMAX 22
int n, m;
int a[NMAX][NMAX];

bool has(int x) {
    for (int i = 1; i <= m; i++) {
        if (a[i][n] == x) {
            return true;
        }
    }
    return false;
}

int main() {
    cin >> m >> n;
    for (int i = 1; i <= m; i++) {
        for (int j = 1; j <= n; j++) {
            cin >> a[i][j];
        }
    }
    for (int i = 1; i <= m; i++) {
        if (has(a[i][1])) {
            cout << a[i][1] << ' ';
        }
    }
    return 0;
}