#include 
using namespace std;
ifstream cin("flip.in");
ofstream cout("flip.out");
int a[30][30];
int main()
{
    ///Citim datele.
    int n , m;
    cin>>n>>m;
    for(int i = 1;i<=n;i++)
        for(int j = 1;j<=m;j++)
            cin>>a[i][j];
    int p = (1<