結果
問題 | No.2731 Two Colors |
ユーザー | detteiuu |
提出日時 | 2024-04-19 22:16:43 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 1,560 ms / 3,000 ms |
コード長 | 1,372 bytes |
コンパイル時間 | 254 ms |
コンパイル使用メモリ | 82,012 KB |
実行使用メモリ | 119,592 KB |
最終ジャッジ日時 | 2024-10-11 15:42:29 |
合計ジャッジ時間 | 18,496 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 33 |
ソースコード
from heapq import heappush, heappop, heapify H, W = map(int, input().split()) A = [list(map(int, input().split())) for _ in range(H)] if H==2 and W==2: exit(print(1)) color0 = [[-1]*W for _ in range(H)] color1 = [[-1]*W for _ in range(H)] color0[0][0] = 0 color1[H-1][W-1] = 1 que0 = [(A[1][0], 1, 0), (A[0][1], 0, 1)] color0[1][0] = 0 color0[0][1] = 0 que1 = [(A[H-2][W-1], H-2, W-1), (A[H-1][W-2], H-1, W-2)] color1[H-2][W-1] = 1 color1[H-1][W-2] = 1 B = [[-1]*W for _ in range(H)] B[0][0] = 0 B[H-1][W-1] = 1 heapify(que0) heapify(que1) direction = [(-1,0),(0,1),(1,0),(0,-1)] cnt = 0 while True: if cnt%2 == 0: n, h, w = heappop(que0) else: n, h, w = heappop(que1) B[h][w] = cnt%2 for dh, dw in direction: if cnt%2 == 0: if 0<=h+dh<H and 0<=w+dw<W and color0[h+dh][w+dw]==-1 and B[h+dh][w+dw]!=1: color0[h+dh][w+dw] = 0 heappush(que0, (A[h+dh][w+dw], h+dh, w+dw)) elif 0<=h+dh<H and 0<=w+dw<W and B[h+dh][w+dw] == 1: exit(print(cnt+1)) else: if 0<=h+dh<H and 0<=w+dw<W and color1[h+dh][w+dw]==-1 and B[h+dh][w+dw]!=0: color1[h+dh][w+dw] = 1 heappush(que1, (A[h+dh][w+dw], h+dh, w+dw)) elif 0<=h+dh<H and 0<=w+dw<W and B[h+dh][w+dw] == 0: exit(print(cnt+1)) cnt += 1