結果
問題 | No.1668 Grayscale |
ユーザー | mkawa2 |
提出日時 | 2023-12-26 01:20:32 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,978 bytes |
コンパイル時間 | 392 ms |
コンパイル使用メモリ | 82,248 KB |
実行使用メモリ | 345,492 KB |
最終ジャッジ日時 | 2024-09-27 14:50:48 |
合計ジャッジ時間 | 9,398 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | WA | - |
testcase_01 | AC | 40 ms
55,040 KB |
testcase_02 | AC | 40 ms
53,408 KB |
testcase_03 | AC | 39 ms
53,176 KB |
testcase_04 | WA | - |
testcase_05 | AC | 40 ms
53,704 KB |
testcase_06 | WA | - |
testcase_07 | AC | 777 ms
342,904 KB |
testcase_08 | AC | 744 ms
257,168 KB |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | AC | 40 ms
53,000 KB |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | AC | 40 ms
54,600 KB |
testcase_23 | AC | 40 ms
53,328 KB |
ソースコード
import sys # sys.setrecursionlimit(1000005) # sys.set_int_max_str_digits(200005) int1 = lambda x: int(x)-1 pDB = lambda *x: print(*x, end="\n", file=sys.stderr) p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr) def II(): return int(sys.stdin.readline()) def LI(): return list(map(int, sys.stdin.readline().split())) def LLI(rows_number): return [LI() for _ in range(rows_number)] def LI1(): return list(map(int1, sys.stdin.readline().split())) def LLI1(rows_number): return [LI1() for _ in range(rows_number)] def SI(): return sys.stdin.readline().rstrip() # dij = [(0, 1), (-1, 0), (0, -1), (1, 0)] dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)] # inf = -1-(-1 << 31) inf = -1-(-1 << 62) # md = 10**9+7 md = 998244353 class UnionFind: def __init__(self, n): self.table = [-1]*n self.mem = [[u] for u in range(n)] self.cnt = n def root(self, u): stack = [] while self.table[u] >= 0: stack.append(u) u = self.table[u] for v in stack: self.table[v] = u return u def same(self, u, v): return self.root(u) == self.root(v) def merge(self, u, v): u = self.root(u) v = self.root(v) if u == v: return False su = -self.table[u] sv = -self.table[v] if su < sv: u, v = v, u self.table[u] = -su-sv self.table[v] = u self.mem[u] += self.mem[v] self.mem[v].clear() self.cnt -= 1 return True def member(self, u): return self.mem[self.root(u)] # グループの要素数 def size(self, u): return -self.table[self.root(u)] h, w, n = LI() cc = LLI(h) uf = UnionFind(h*w) for i in range(h): for j in range(w): ij = i*w+j if i and cc[i][j] == cc[i-1][j]: uf.merge(ij, ij-w) if j and cc[i][j] == cc[i][j-1]: uf.merge(ij, ij-1) m = 0 ij2u = [0]*h*w for ijs in uf.mem: if not ijs: continue for ij in ijs: ij2u[ij] = m m += 1 # print(ij2u) to = [[] for _ in range(m)] indeg = [0]*m for i in range(h): for j in range(w): ij = i*w+j u = ij2u[ij] if i: v = ij2u[ij-w] if cc[i][j] < cc[i-1][j]: to[u].append(v);indeg[v] += 1 if cc[i][j] > cc[i-1][j]: to[v].append(u);indeg[u] += 1 if j: v = ij2u[ij-1] if cc[i][j] < cc[i][j-1]: to[u].append(v);indeg[v] += 1 if cc[i][j] > cc[i][j-1]: to[v].append(u);indeg[u] += 1 def topological_sort(to, indeg): stack = [u for u, d in enumerate(indeg) if d == 0] deg = indeg[:] uu = [] while stack: u = stack.pop() uu.append(u) for v in to[u]: deg[v] -= 1 if deg[v] == 0: stack.append(v) if len(uu) != len(deg): return [] return uu uu = topological_sort(to, indeg) nc = [0]*m for u in uu: for v in to[u]: nc[v] = max(nc[v], nc[u]+1) print(max(nc)+1)