#include<stdio.h>

int a[1001][1001],b[1001][1001],i,j,n,m,k,l,s;
FILE *f,*g;

int main()
{
freopen("dreptpal.in","r",stdin);
freopen("dreptpal.out","w",stdout);
scanf("%d%d",&n,&m);
for(i=0;i<n;i++)
for(j=0;j<m;j++)
	scanf("%d",&a[i][j]);

for(i=0;i<n;i++)
for(j=1;j<m-1;j++)
{k=1;
	while(a[i][j-k]==a[i][j+k]&&k<=j&&k<n-j) k++;
	b[i][j]=2*k-1;
}


}