#include <fstream>
using namespace std;
ifstream f("flip.in");
ofstream g("flip.out");
int a[100][100],k,n,m,i,j,s,smax;
int main()
{
    s=0;
    smax=0; k=0;
  f>>n>>m;
  for(i=1;i<=n;i++)
    f>>a[i][j];
 for(i=1;i<=n;i++)
      for(k=1;k<=m;k++)
  s+=a[i][j];
  if(s>smax)
  smax=s;
  g<<smax<<" ";
    return 0;
}