結果
問題 | No.1494 LCS on Tree |
ユーザー | kaage |
提出日時 | 2021-04-10 00:48:23 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 6,500 bytes |
コンパイル時間 | 2,700 ms |
コンパイル使用メモリ | 169,948 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-06-25 13:29:46 |
合計ジャッジ時間 | 9,931 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | RE | - |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | RE | - |
testcase_15 | RE | - |
testcase_16 | RE | - |
testcase_17 | RE | - |
testcase_18 | RE | - |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | AC | 2 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
testcase_30 | RE | - |
testcase_31 | RE | - |
testcase_32 | RE | - |
testcase_33 | RE | - |
testcase_34 | RE | - |
testcase_35 | RE | - |
testcase_36 | RE | - |
testcase_37 | RE | - |
testcase_38 | RE | - |
testcase_39 | RE | - |
testcase_40 | RE | - |
testcase_41 | RE | - |
testcase_42 | RE | - |
testcase_43 | RE | - |
testcase_44 | RE | - |
testcase_45 | RE | - |
testcase_46 | RE | - |
testcase_47 | RE | - |
testcase_48 | RE | - |
testcase_49 | RE | - |
ソースコード
#line 2 "library/other/template.hpp" #define _CRT_SECURE_NO_WARNINGS #ifndef __clang__ #ifdef ONLINE_JUDGE #pragma GCC target("avx512f") #elif defined EVAL #else #pragma GCC target("avx2") #endif #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #endif #include <string.h> #include <algorithm> #include <array> #include <bitset> #include <cassert> #include <cfloat> #include <climits> #include <cmath> #include <complex> #include <ctime> #include <deque> #include <fstream> #include <functional> #include <iomanip> #include <iostream> #include <iterator> #include <list> #include <map> #include <memory> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> #define rep(i, n) for (int i = 0; i < int(n); i++) #define REP(i, n) for (int i = 1; i <= int(n); i++) #define all(V) V.begin(), V.end() using i128 = __int128_t; using u128 = __uint128_t; using uint = unsigned int; using lint = long long; using ulint = unsigned long long; using IP = std::pair<int, int>; using LP = std::pair<lint, lint>; constexpr int INF = INT_MAX / 2; constexpr lint LINF = LLONG_MAX / 2; constexpr double eps = DBL_EPSILON; constexpr double PI = 3.141592653589793238462643383279; template <class T> class prique : public std::priority_queue<T, std::vector<T>, std::greater<T>> { }; int popcount(uint x) { #if __cplusplus >= 202002L return std::popcount(x); #else #ifndef __clang__ return __builtin_popcount(x); #endif #endif x = (x & 0x55555555) + (x >> 1 & 0x55555555); x = (x & 0x33333333) + (x >> 2 & 0x33333333); x = (x & 0x0f0f0f0f) + (x >> 4 & 0x0f0f0f0f); x = (x & 0x00ff00ff) + (x >> 8 & 0x00ff00ff); return (x & 0x0000ffff) + (x >> 16 & 0x0000ffff); } template <class F> inline constexpr decltype(auto) lambda_fix(F&& f) { return [f = std::forward<F>(f)](auto&&... args) { return f(f, std::forward<decltype(args)>(args)...); }; } template <class T> constexpr std::vector<T> make_vec(size_t n) { return std::vector<T>(n); } template <class T, class... Args> constexpr auto make_vec(size_t n, Args&&... args) { return std::vector<decltype(make_vec<T>(args...))>( n, make_vec<T>(std::forward<Args>(args)...)); } template <class T, class U> constexpr inline bool chmax(T& lhs, const U& rhs) noexcept { if (lhs < rhs) { lhs = rhs; return true; } return false; } template <class T, class U> constexpr inline bool chmin(T& lhs, const U& rhs) noexcept { if (lhs > rhs) { lhs = rhs; return true; } return false; } constexpr inline lint gcd(lint a, lint b) noexcept { while (b) { lint c = a; a = b; b = c % b; } return a; } inline lint lcm(lint a, lint b) noexcept { return a / gcd(a, b) * b; } constexpr bool isprime(lint n) noexcept { if (n == 1) return false; for (int i = 2; i * i <= n; i++) { if (n % i == 0) return false; } return true; } template <class T> constexpr T mypow(T a, lint b) noexcept { T res(1); while (true) { if (b & 1) res *= a; b >>= 1; if (!b) break; a *= a; } return res; } constexpr lint modpow(lint a, lint b, lint m) noexcept { a %= m; lint res(1); while (b) { if (b & 1) { res *= a; res %= m; } a *= a; a %= m; b >>= 1; } return res; } template <class T> constexpr void printArray(const std::vector<T>& vec, char split = ' ') { rep(i, vec.size()) { std::cout << vec[i]; std::cout << (i == (int)vec.size() - 1 ? '\n' : split); } } template <class InputIter> constexpr void printArray(InputIter l, InputIter r, char split = ' ') { auto rprev = std::prev(r); for (auto i = l; i != r; i++) { std::cout << *i; std::cout << (i == rprev ? '\n' : split); } } LP extGcd(lint a, lint b) noexcept { if (b == 0) return {1, 0}; LP s = extGcd(b, a % b); std::swap(s.first, s.second); s.second -= a / b * s.first; return s; } LP ChineseRem(const lint& b1, const lint& m1, const lint& b2, const lint& m2) noexcept { auto p = extGcd(m1, m2); lint g = gcd(m1, m2), l = m1 / g * m2; lint tmp = (b2 - b1) / g * p.first % (m2 / g); lint r = (b1 + m1 * tmp + l) % l; return {r, l}; } int LCS(const std::string& a, const std::string& b) { auto dp = make_vec<int>(a.size() + 1, b.size() + 1); rep(i, a.size()) { rep(j, b.size()) { chmax(dp[i + 1][j], dp[i][j]); chmax(dp[i][j + 1], dp[i][j]); if (a[i] == b[j]) chmax(dp[i + 1][j + 1], dp[i][j] + 1); } chmax(dp[i + 1][b.size()], dp[i][b.size()]); } rep(j, b.size()) chmax(dp[a.size()][j + 1], dp[a.size()][j]); return dp[a.size()][b.size()]; } template <class T, std::enable_if_t<std::is_convertible<int, T>::value, std::nullptr_t> = nullptr> void compress(std::vector<T>& vec) { auto tmp = vec; std::sort(all(tmp)); tmp.erase(std::unique(all(tmp)), tmp.end()); for (T& i : vec) i = std::lower_bound(all(tmp), i) - tmp.begin(); } template <class T> void compress(T* l, T* r) { std::vector<T> tmp(l, r); std::sort(all(tmp)); tmp.erase(std::unique(all(tmp)), tmp.end()); for (auto i = l; i < r; i++) { *i = std::lower_bound(all(tmp), *i) - tmp.begin(); } } template <class InputIter> void compress(InputIter l, InputIter r) { std::vector<typename InputIter::value_type> tmp(l, r); std::sort(all(tmp)); tmp.erase(std::unique(all(tmp)), tmp.end()); for (auto i = l; i < r; i++) { *i = std::lower_bound(all(tmp), *i) - tmp.begin(); } } #line 2 "main.cpp" int N; std::string S[2]; std::vector<std::pair<int, char>> vec[2010]; int dp[2][2010][2010]; bool done[2010]; int main() { std::cin >> N >> S[0]; S[1] = S[0]; std::reverse(all(S[1])); rep(i, N - 1) { int u, v; char c; std::cin >> u >> v >> c; vec[u].emplace_back(v, c); vec[v].emplace_back(u, c); } std::fill(done + 1, done + N + 1, false); int ans = 0; lambda_fix([&](auto self, int node) -> void { done[node] = true; std::vector<std::multiset<int>> v(vec[node].size()); for (const auto& i : vec[node]) { if (!done[i.first]) { self(self, i.first); std::vector<int> update[2]; rep(j, 2) update[j].resize(S[0].size() + 1); int cnt[2] = {}; rep(j, S[0].size() + 1) { rep(k, 2) { chmax(cnt[k], dp[k][i.first][j]); if (j != S[0].size() && S[k][j] == i.second) chmax(update[k][j + 1], cnt[k] + 1); chmax(update[k][j], cnt[k]); chmax(ans, update[k][j] + dp[1 - k][node][S[0].size() - j]); } } rep(j, 2) { rep(k, S[0].size() + 1) chmax(dp[j][node][k], update[j][k]); } } } })(1); std::cout << ans << std::endl; return 0; }