結果

問題 No.2456 Stamp Art
ユーザー detteiuu
提出日時 2024-12-22 07:46:36
言語 PyPy3
(7.3.15)
結果
MLE  
実行時間 -
コード長 1,740 bytes
コンパイル時間 393 ms
コンパイル使用メモリ 82,224 KB
実行使用メモリ 539,784 KB
最終ジャッジ日時 2024-12-22 07:47:14
合計ジャッジ時間 38,389 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 11 MLE * 12
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

class cum2:
    def __init__(self, A):
        self.cum = [[0]*(len(A[0])+1) for _ in range(len(A)+1)]
        for i in range(len(A)):
            for j in range(len(A[0])):
                self.cum[i+1][j+1] = A[i][j]
        for i in range(1, len(A)+1):
            for j in range(2, len(A[0])+1):
                self.cum[i][j] += self.cum[i][j-1]
        for i in range(2, len(A)+1):
            for j in range(1, len(A[0])+1):
                self.cum[i][j] += self.cum[i-1][j]
    def query(self, lh, lw, rh, rw):
        return self.cum[rh+1][rw+1]+self.cum[lh][lw]-self.cum[rh+1][lw]-self.cum[lh][rw+1]
H, W = map(int, input().split())
S = [list(input()) for _ in range(H)]
def func(n):
    imos = [[0]*(W+1) for _ in range(H+1)]
    for i in range(H-n+1):
        for j in range(W-n+1):
            if cum.query(i, j, i+n-1, j+n-1) == n**2:
                imos[i][j] += 1
                imos[i+n][j+n] += 1
                imos[i][j+n] -= 1
                imos[i+n][j] -= 1
    for i in range(H+1):
        for j in range(1, W+1):
            imos[i][j] += imos[i][j-1]
    for i in range(1, H+1):
        for j in range(W+1):
            imos[i][j] += imos[i-1][j]
    imos.pop()
    for i in range(H):
        for j in range(W):
            if 1 <= imos[i][j] and S[i][j] == ".":
                return False
            elif 0 == imos[i][j] and S[i][j] == "#":
                return False
        imos[i].pop()
    return True
C = [[0]*W for _ in range(H)]
for i in range(H):
    for j in range(W):
        if S[i][j] == "#":
            C[i][j] = 1
cum = cum2(C)
left = 1
right = min(H, W)+1
while left+1 < right:
    mid = (left+right)//2
    if func(mid):
        left = mid
    else:
        right = mid
print(left)
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