結果
問題 | No.1494 LCS on Tree |
ユーザー | mkawa2 |
提出日時 | 2022-11-08 22:17:56 |
言語 | PyPy3 (7.3.15) |
結果 |
MLE
|
実行時間 | - |
コード長 | 3,000 bytes |
コンパイル時間 | 184 ms |
コンパイル使用メモリ | 82,048 KB |
実行使用メモリ | 858,716 KB |
最終ジャッジ日時 | 2024-07-22 06:08:25 |
合計ジャッジ時間 | 3,727 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 | AC | 46 ms
54,432 KB |
testcase_01 | AC | 41 ms
53,120 KB |
testcase_02 | AC | 42 ms
53,376 KB |
testcase_03 | MLE | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
testcase_28 | -- | - |
testcase_29 | -- | - |
testcase_30 | -- | - |
testcase_31 | -- | - |
testcase_32 | -- | - |
testcase_33 | -- | - |
testcase_34 | -- | - |
testcase_35 | -- | - |
testcase_36 | -- | - |
testcase_37 | -- | - |
testcase_38 | -- | - |
testcase_39 | -- | - |
testcase_40 | -- | - |
testcase_41 | -- | - |
testcase_42 | -- | - |
testcase_43 | -- | - |
testcase_44 | -- | - |
testcase_45 | -- | - |
testcase_46 | -- | - |
testcase_47 | -- | - |
testcase_48 | -- | - |
testcase_49 | -- | - |
ソースコード
import sys # sys.setrecursionlimit(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 << 63)-1 # inf = (1 << 31)-1 # md = 10**9+7 md = 998244353 class t2: def __init__(self): self.v1 = 0 self.u1 = -1 self.v2 = -1 self.u2 = -1 def __repr__(self): return f"({self.v1},{self.u1},{self.v2},{self.u2})" def update(self, v, u): if v > self.v1: self.v2, self.u2 = self.v1, self.u1 self.v1, self.u1 = v, u elif v > self.v2 and u != self.u1: self.v2, self.u2 = v, u # def max(self, ng=-2): # if self.u1 == ng: return self.v2, self.u2 # return self.v1, self.u1 # def merge(self, other): if self.u1 == other.u1: return max(self.v1+other.v2, self.v2+other.v1) return other.v1+self.v1 n = II() s = [ord(c)-97 for c in SI()] m = len(s) to = [[] for _ in range(n)] for _ in range(n-1): u, v, c = SI().split() u = int1(u) v = int1(v) c = ord(c)-97 to[u].append((v, c)) to[v].append((u, c)) parent, depth, vis = [-1]*n, [0]*n, [0]*n cc = [""]*n def dfs(root): uu = [] vis[root] = 1 stack = [root] while stack: iu = stack.pop() i, u = divmod(iu, n) if i == 0: uu.append(u) # care to's format while i < len(to[u]) and vis[to[u][i][0]]: i += 1 if i < len(to[u]): stack.append((i+1)*n+u) # care to's format v, c = to[u][i] vis[v] = 1 stack.append(v) parent[v] = u depth[v] = depth[u]+1 cc[v] = c return uu uu = dfs(0) def dodp(s): def chmax(i, j, val): if val > dp[i][j]: dp[i][j] = val dp = [[t2() for _ in range(m+1)] for _ in range(n)] for u in uu[::-1]: p = parent[u] for i, c in enumerate(s): pre = dp[u][i] if c == cc[u]: dp[p][i+1].update(pre.v1+1, u) # chmax(p, i+1, pre+1) elif pre: if p != -1: dp[p][i].update(pre.v1, u) if i+1 <= m: dp[u][i+1].update(pre.v1, pre.u1) return dp dp = dodp(s) rdp = dodp(s[::-1]) ans = max(dp[0][m].v1, rdp[0][m].v1) for u in range(n): for i in range(m+1): # pDB(u, i, dp[u][i], rdp[u][m-i]) ans = max(ans, dp[u][i].merge(rdp[u][m-i])) # pDB(ans) print(ans)