def main1(n,m,a):
  ary=[0]*m
  for x in a:
    for j in range(m):
      ary[j]+=x[j]
  b=[]
  for x in a:
    tmp=0
    for j in range(m):
      tmp+=x[j]*ary[j]
    b.append(tmp)
  b.sort()
  x=sum([v for v in b[::2]])
  y=sum([v for v in b[1::2]])
  return abs(x-y)
if __name__=='__main__':
  n,m=map(int,input().split())
  a=[list(map(int,input().split())) for _ in range(n)]
  ret1=main1(n,m,a)
  print(ret1)