import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;
public class Main {
    //Program start
    
    //Program end

    @Test
public void test1() {
    assertEquals(3, maximumMinutes(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(0,2,0,0,0,0,0)),new ArrayList<>(Arrays.asList(0,0,0,2,2,1,0)),new ArrayList<>(Arrays.asList(0,2,0,0,1,2,0)),new ArrayList<>(Arrays.asList(0,0,2,2,2,0,2)),new ArrayList<>(Arrays.asList(0,0,0,0,0,0,0))))));
}
@Test
public void test2() {
    assertEquals(-1, maximumMinutes(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(0,0,0,0)),new ArrayList<>(Arrays.asList(0,1,2,0)),new ArrayList<>(Arrays.asList(0,2,0,0))))));
}
@Test
public void test3() {
    assertEquals(1000000000, maximumMinutes(new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(0,0,0)),new ArrayList<>(Arrays.asList(2,2,0)),new ArrayList<>(Arrays.asList(1,2,0))))));
}

}