665 B | 665 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
h, w = mii()
l = [mii() for _ in range(h)]
mn = 11111111111111111111111
for i in range(h):
for j in range(w):
cnt = 0
for y in range(h):
for x in range(w):
cnt += l[y][x] * min(abs(y - i), abs(x - j))
mn = min(mn, cnt)
print(mn)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()