#include<stdio.>
int main()
{
  int m,n;
  scanf("%d %d",&m,&n);
  if(m<=0||n<=0)
  {
      printf("Invalid input");
      return 0;
  }
  int matrix[m][n];
  int i,j;
  for(i=0;i<m;i+=)
  {
      for(j=0;j<n;j++)
      {
          scanf("%d",&matrix[i][j]);
      }
  }
  int maxsum = -999999,maxRow = 0;
  for(i=0;i<m;i++)
  {
      int rewsum= 0;
      for(j=0;j<n;j++)
      {
          rowsum += matrix[i][j];
      }
      if(rowsum>maxxsum)
      {
          maxsum =  rowsum;
          maxRow = i;
      }     
  }
  printf("%d",maxRow);
  return 0;
}