N, M = map(int, input().split())
A = [list(map(int, input().split())) for _ in range(N)]

S = [0] * M
for i in range(N):
    for j in range(M):
        S[j] += A[i][j]

data = [sum(S[j]*A[i][j] for j in range(M)) for i in range(N)]
data.sort()

ans = sum(data[1:N:2]) - sum(data[0:N:2])
print(ans)