(Python/LV0) 안전지대

문제 출처: https://school.programmers.co.kr/learn/courses/30/lessons/120866?language=python3 

프로그래머스

풀이:

def solution(board):
    board_True = [[0 for col in range(len(board))] for row in range(len(board))]
    mine = 0
    for line in range(1, len(board)-1):
        for spot in range(1,len(board[0])-1):
            if board[line][spot] == 1:
                board_True[line-1][spot-1:spot+2] = "False","False","False"     # up
                board_True[line][spot-1:spot+2] = "False","False","False"             #mid
                board_True[line+1][spot-1:spot+2] = "False","False","False"     #down
    return (len(board)*len(board)) - sum(board_True,[]).count('False') - mine

2개 맞는 풀이

 

일다 첫번째 라인 / 각 라인별 0번째를 제외하고 했다

 

이 답안 문제

첫째라인만 1 나오고 각라인별 0번째 1나오고 마지막 라인 0나왔을때 틀림

 

def solution(board):
    answer = 0

    for col in range(len(board)):
        for row in range(len(board[col])):
            if board[row][col] == 1:
                for j in range(max(col-1,0),min(col+2,len(board))):
                    for i in range(max(row-1,0),min(row+2,len(board))):
                        if board[i][j] == 1:
                            continue
                        board[i][j] = -1
    for i in board:
        answer += i.count(0)

    return answer

 

for j in (max(col-1),0), min(col+2, len(board)) : 이 부분 생각지도 못했다 2시간은 넘게쓴듯,,

출처: 프로그래머스 Moral Life