n, m = map(int, input().split())
a = [list(map(int, input().split())) for _ in range(n)]
l = [0] * m
for i in range(n):
    for j in range(m):
        l[j] += a[i][j]
p = [0] * n
for i in range(n):
    for j in range(m):
        p[i] += a[i][j] * l[j]
p.sort(reverse=True)
print(sum(p[::2]) - sum(p[1::2]))