BOJ - 14647 - 준오는 조류혐오야!!

import sys

def solution():
    N, M = map(int, sys.stdin.readline().split())
    maps = []
    for _ in range(N):
        maps.append(list(map(str, sys.stdin.readline().split())))

    ret = 0
    total = 0
    for i in range(N):
        temp = 0
        for j in range(M):
            for k in range(len(maps[i][j])):
                if '9' == maps[i][j][k]:
                    temp += 1
                    total += 1
        ret = max(ret, temp)

    for i in range(M):
        temp = 0
        for j in range(N):
            for k in range(len(maps[j][i])):
                if '9' == maps[j][i][k]:
                    temp += 1
                    total += 1
        ret = max(ret, temp)

    print((total // 2) - ret)
solution()

https://www.acmicpc.net/problem/14647