import sys
input = sys.stdin.readline
N, M = map(int, input().split())
a = [list(map(int, input().split())) for _ in range(N)]
table = [0] * M
for i in range(N):
  for j in range(M): table[j] += a[i][j]
a.sort(key = lambda x: -sum([x[i] * table[i] for i in range(M)]))
res = 0
for i in range(N):
  x = a[i]
  if i % 2 == 0: res += sum([x[i] * table[i] for i in range(M)])
  else: res -= sum([x[i] * table[i] for i in range(M)])
print(res)