Created
July 23, 2020 09:23
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import sys | |
r, c = map(int, sys.stdin.readline().split()) | |
maps = [] | |
for y in range(r): | |
arr = list(sys.stdin.readline().replace("\n","")) | |
maps.append(arr) | |
# 많은 파이프를 심으려면, 최대한 우상향으로 접근해야 함. | |
dirs = [(-1,1),(0,1),(1,1)] | |
end_line = len(maps[0])-1 | |
def connect_pipe(y: int, x: int) -> bool: | |
# 현재 위치에 파이프 생성 | |
maps[y][x] = 'x' | |
if x == end_line: | |
return True | |
for dy, dx in dirs: | |
ny, nx = y+dy, x+dx | |
# 다음 위치에 파이프 생성이 가능한지 확인 | |
if 0 <= ny < len(maps) and 0 <= nx < len(maps[0]) and maps[ny][nx] == ".": | |
if connect_pipe(ny, nx): | |
# 끝까지 설치가 가능할 경우 이 분기로 진입하게 됨. | |
return True | |
return False | |
answer = 0 | |
for y in range(len(maps)): | |
if connect_pipe(y,0): | |
answer += 1 | |
print(answer) | |
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