882 B | 882 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
# sys.setrecursionlimit(10**7)
BLANK = " "
# inp = input
inp = lambda : sys.stdin.readline().rstrip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def solve():
n, m = mii()
l = [mii() for _ in range(n)]
ans = 0
for i in range(m):
for j in range(i + 1, m):
for k in range(j + 1, m):
idx = [i, j, k]
ret = 0
for per in range(n):
mx = 0
for t in idx:
mx = max(mx, l[per][t])
ret += mx
ans = max(ans, ret)
p(ans)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()