結果
問題 | No.1494 LCS on Tree |
ユーザー | kaikey |
提出日時 | 2021-04-30 22:35:46 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,505 bytes |
コンパイル時間 | 3,151 ms |
コンパイル使用メモリ | 247,384 KB |
実行使用メモリ | 35,712 KB |
最終ジャッジ日時 | 2024-07-19 02:14:18 |
合計ジャッジ時間 | 6,100 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | WA | - |
testcase_04 | AC | 29 ms
35,456 KB |
testcase_05 | AC | 30 ms
35,328 KB |
testcase_06 | AC | 29 ms
35,328 KB |
testcase_07 | AC | 28 ms
35,456 KB |
testcase_08 | AC | 29 ms
35,328 KB |
testcase_09 | AC | 30 ms
35,328 KB |
testcase_10 | AC | 29 ms
35,328 KB |
testcase_11 | AC | 31 ms
35,456 KB |
testcase_12 | AC | 33 ms
35,456 KB |
testcase_13 | AC | 29 ms
35,328 KB |
testcase_14 | AC | 28 ms
35,712 KB |
testcase_15 | AC | 29 ms
35,584 KB |
testcase_16 | AC | 29 ms
35,456 KB |
testcase_17 | AC | 30 ms
35,584 KB |
testcase_18 | AC | 30 ms
35,584 KB |
testcase_19 | AC | 1 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 1 ms
5,376 KB |
testcase_23 | AC | 1 ms
5,376 KB |
testcase_24 | AC | 1 ms
5,376 KB |
testcase_25 | AC | 1 ms
5,376 KB |
testcase_26 | AC | 1 ms
5,376 KB |
testcase_27 | WA | - |
testcase_28 | AC | 2 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | AC | 3 ms
5,376 KB |
testcase_36 | AC | 12 ms
13,184 KB |
testcase_37 | AC | 3 ms
5,376 KB |
testcase_38 | AC | 8 ms
10,752 KB |
testcase_39 | AC | 15 ms
18,048 KB |
testcase_40 | AC | 5 ms
8,192 KB |
testcase_41 | AC | 21 ms
27,008 KB |
testcase_42 | AC | 5 ms
8,064 KB |
testcase_43 | AC | 20 ms
24,704 KB |
testcase_44 | AC | 16 ms
19,072 KB |
testcase_45 | AC | 221 ms
35,456 KB |
testcase_46 | AC | 222 ms
35,328 KB |
testcase_47 | AC | 200 ms
35,456 KB |
testcase_48 | AC | 200 ms
35,456 KB |
testcase_49 | AC | 210 ms
35,456 KB |
ソースコード
#include "bits/stdc++.h" #include <random> #include <chrono> #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define SZ(x) ((lint)(x).size()) #define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i) #define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) #define endk '\n' using namespace std; typedef unsigned long long _ulong; typedef int lint; typedef long double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld; struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_; template<class T> auto add = [](T a, T b) -> T { return a + b; }; template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); }; template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); }; template<class T> using V = vector<T>; using Vl = V<lint>; using VVl = V<Vl>; template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) { for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : ""); return os; } template< typename T >istream& operator>>(istream& is, vector< T >& v) { for (T& in : v) is >> in; return is; } template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } template <class T> T div_floor(T a, T b) { if (b < 0) a *= -1, b *= -1; return a >= 0 ? a / b : (a + 1) / b - 1; } template <class T> T div_ceil(T a, T b) { if (b < 0) a *= -1, b *= -1; return a > 0 ? (a - 1) / b + 1 : a / b; } template <class F> struct rec { F f; rec(F&& f_) : f(std::forward<F>(f_)) {} template <class... Args> auto operator()(Args &&... args) const { return f(*this, std::forward<Args>(args)...); } }; lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); } lint digit(lint a) { return (lint)log10(a); } lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); } lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); } bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); } const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e9; lint dx[8] = { 0, -1, 0, 1, 1, -1, 1, -1 }, dy[8] = { -1, 0, 1, 0, -1, -1, 1, 1 }; bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; } struct Edge { lint from, to; lint cost; Edge() { } Edge(lint u, lint v, lint c) { cost = c; from = u; to = v; } bool operator<(const Edge& e) const { return cost < e.cost; } }; struct WeightedEdge { lint to; lint cost; WeightedEdge(lint v, lint c = 1) { to = v; cost = c; } bool operator<(const WeightedEdge& e) const { return cost < e.cost; } }; using WeightedGraph = V<V<WeightedEdge>>; typedef pair<lint, plint> tlint; typedef pair<plint, plint> qlint; typedef pair<lint, char> valstr; lint N; int main() { cin >> N; string s; cin >> s; VVl poses(26); REP(i, SZ(s)) poses[s[i] - 'a'].push_back(i); V<V<valstr>> to(N); REP(i, N - 1) { lint u, v; char c; cin >> u >> v >> c; u--; v--; to[u].push_back({ v, c }); to[v].push_back({ u, c }); } V<VVl> dp(N); Vl tmp(SZ(s) + 1, -1); V<map<lint, lint>> fx(N); REP(i, N) { dp[i].assign(SZ(to[i]), tmp); REP(j, SZ(to[i])) { fx[i][to[i][j].first] = j; } } auto dfs = [&](auto&& dfs, lint curr, lint prv, lint idx) -> lint { if (dp[curr][fx[curr][prv]][idx] != -1) return dp[curr][fx[curr][prv]][idx]; lint maxv = 0; for (auto nxt : to[curr]) { if (prv == nxt.first) continue; lint _c = nxt.second - 'a'; lint nxt_idx = lower_bound(ALL(poses[_c]), idx) - poses[_c].begin(); if (nxt_idx != SZ(poses[_c])) { chmax(maxv, dfs(dfs, nxt.first, curr, poses[_c][nxt_idx] + 1) + 1); } else { chmax(maxv, dfs(dfs, nxt.first, curr, idx)); } } return dp[curr][fx[curr][prv]][idx] = maxv; }; lint ans = 0; REP(i, N) { chmax(ans, dfs(dfs, i, -1, 0)); } cout << ans << endk; }