import sys
input = sys.stdin.readline

def main():
    N,M = map(int,input().split())
    A = [tuple(map(int,input().split())) for _ in range(N)]

    X = [0] * M
    C = [0]*M
    for i in range(N):
        for j in range(M):
            C[j] += A[i][j]
    
    used = [False] * N
    for i in range(N):
        if i%2 == 0:
            M = 0
            idx = -1
            for j in range(N):
                if used[j]:
                    continue
                ret = sum((a + b)*c for a,b,c in zip(A[j],X,C))
                if ret > M:
                    ret = M
                    idx = j
            X = [x + a for x,a in zip(X,A[idx])]
            used[idx] = True
        else:
            M = 0
            idx = -1
            for j in range(N):
                if used[j]:
                    continue
                ret = sum((a - b)*c for a,b,c in zip(A[j],X,C))
                if ret < M:
                    ret = M
                    idx = j
            X = [x - a for x,a in zip(X,A[idx])]
            used[idx] = True
    ans = sum(x*c for x,c in zip(X,C))
    print(ans)
if __name__ == '__main__':
    main()