結果
問題 | No.1494 LCS on Tree |
ユーザー | noimi |
提出日時 | 2021-04-30 22:41:10 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,443 ms / 2,000 ms |
コード長 | 15,819 bytes |
コンパイル時間 | 3,391 ms |
コンパイル使用メモリ | 236,348 KB |
最終ジャッジ日時 | 2025-01-21 04:00:01 |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 47 |
ソースコード
#pragma region Macros// #pragma GCC target("avx2")#pragma GCC optimize("O3")// #pragma GCC optimize("unroll-loops")#include <bits/stdc++.h>#define ll long long#define ld long double#define rep2(i, a, b) for(ll i = a; i <= b; ++i)#define rep(i, n) for(ll i = 0; i < n; ++i)#define rep3(i, a, b) for(ll i = a; i >= b; --i)#define pii pair<int, int>#define pll pair<ll, ll>#define pb push_back#define eb emplace_back#define vi vector<int>#define vll vector<ll>#define vpi vector<pii>#define vpll vector<pll>#define overload2(_1, _2, name, ...) name#define vec(type, name, ...) vector<type> name(__VA_ARGS__)#define VEC(type, name, size)\vector<type> name(size);\IN(name)#define vv(type, name, h, ...) vector<vector<type>> name(h, vector<type>(__VA_ARGS__))#define VV(type, name, h, w)\vector<vector<type>> name(h, vector<type>(w));\IN(name)#define vvv(type, name, h, w, ...) vector<vector<vector<type>>> name(h, vector<vector<type>>(w, vector<type>(__VA_ARGS__)))#define vvvv(type, name, a, b, c, ...)\vector<vector<vector<vector<type>>>> name(a, vector<vector<vector<type>>>(b, vector<vector<type>>(c, vector<type>(__VA_ARGS__))))#define mt make_tuple#define fi first#define se second#define all(c) begin(c), end(c)#define SUM(v) accumulate(all(v), 0LL)#define MIN(v) *min_element(all(v))#define MAX(v) *max_element(all(v))#define lb(c, x) distance((c).begin(), lower_bound(all(c), (x)))#define ub(c, x) distance((c).begin(), upper_bound(all(c), (x)))using namespace std;constexpr pii dx4[4] = {pii{1, 0}, pii{0, 1}, pii{-1, 0}, pii{0, -1}};constexpr pii dx8[8] = {{1, 0}, {1, 1}, {0, 1}, {-1, 1}, {-1, 0}, {-1, -1}, {0, -1}, {1, -1}};const string YESNO[2] = {"NO", "YES"};const string YesNo[2] = {"No", "Yes"};const string yesno[2] = {"no", "yes"};void YES(bool t = 1) { cout << YESNO[t] << endl; }void NO(bool t = 1) { YES(!t); }void Yes(bool t = 1) { cout << YesNo[t] << endl; }void No(bool t = 1) { Yes(!t); }void yes(bool t = 1) { cout << yesno[t] << endl; }void no(bool t = 1) { yes(!t); }template <class T> using vc = vector<T>;template <class T> using vvc = vector<vc<T>>;template <class T> using vvvc = vector<vvc<T>>;template <class T> using vvvvc = vector<vvvc<T>>;template <class T> using pq = priority_queue<T>;template <class T> using pqg = priority_queue<T, vector<T>, greater<T>>;#define si(c) (int)(c).size()#define INT(...)\int __VA_ARGS__;\IN(__VA_ARGS__)#define LL(...)\ll __VA_ARGS__;\IN(__VA_ARGS__)#define STR(...)\string __VA_ARGS__;\IN(__VA_ARGS__)#define CHR(...)\char __VA_ARGS__;\IN(__VA_ARGS__)#define DBL(...)\double __VA_ARGS__;\IN(__VA_ARGS__)int scan() { return getchar(); }void scan(int &a) { cin >> a; }void scan(long long &a) { cin >> a; }void scan(char &a) { cin >> a; }void scan(double &a) { cin >> a; }void scan(string &a) { cin >> a; }template <class T, class S> void scan(pair<T, S> &p) { scan(p.first), scan(p.second); }template <class T> void scan(vector<T> &);template <class T> void scan(vector<T> &a) {for(auto &i : a) scan(i);}template <class T> void scan(T &a) { cin >> a; }void IN() {}template <class Head, class... Tail> void IN(Head &head, Tail &...tail) {scan(head);IN(tail...);}template <class T, class S> inline bool chmax(T &a, const S &b) { return (a < b ? a = b, 1 : 0); }template <class T, class S> inline bool chmin(T &a, const S &b) { return (a > b ? a = b, 1 : 0); }vi iota(int n) {vi a(n);iota(all(a), 0);return a;}template <typename T> vi iota(vector<T> &a, bool greater = false) {vi res(a.size());iota(all(res), 0);sort(all(res), [&](int i, int j) {if(greater) return a[i] > a[j];return a[i] < a[j];});return res;}#define UNIQUE(x) sort(all(x)), x.erase(unique(all(x)), x.end())template <class T> T ceil(T x, T y) {assert(y >= 1);return (x > 0 ? (x + y - 1) / y : x / y);}template <class T> T floor(T x, T y) {assert(y >= 1);return (x > 0 ? x / y : (x + y - 1) / y);}template <class T> T POW(T x, int n) {T res = 1;for(; n; n >>= 1, x *= x)if(n & 1) res *= x;return res;}vector<pll> factor(ll x) {vector<pll> ans;for(ll i = 2; i * i <= x; i++)if(x % i == 0) {ans.push_back({i, 1});while((x /= i) % i == 0) ans.back().second++;}if(x != 1) ans.push_back({x, 1});return ans;}template <class T> vector<T> divisor(T x) {vector<T> ans;for(T i = 1; i * i <= x; i++)if(x % i == 0) {ans.pb(i);if(i * i != x) ans.pb(x / i);}return ans;}template <typename T> void zip(vector<T> &x) {vector<T> y = x;sort(all(y));for(int i = 0; i < x.size(); ++i) { x[i] = lb(y, x[i]); }}// bit 演算系ll pow2(int i) { return 1LL << i; }int topbit(signed t) { return t == 0 ? -1 : 31 - __builtin_clz(t); }int topbit(ll t) { return t == 0 ? -1 : 63 - __builtin_clzll(t); }int lowbit(signed a) { return a == 0 ? 32 : __builtin_ctz(a); }int lowbit(ll a) { return a == 0 ? 64 : __builtin_ctzll(a); }// int allbit(int n) { return (1 << n) - 1; }ll allbit(ll n) { return (1LL << n) - 1; }int popcount(signed t) { return __builtin_popcount(t); }int popcount(ll t) { return __builtin_popcountll(t); }bool ispow2(int i) { return i && (i & -i) == i; }int in() {int x;cin >> x;return x;}ll lin() {unsigned long long x;cin >> x;return x;}template <class T> pair<T, T> operator-(const pair<T, T> &x, const pair<T, T> &y) { return pair<T, T>(x.fi - y.fi, x.se - y.se); }template <class T> pair<T, T> operator+(const pair<T, T> &x, const pair<T, T> &y) { return pair<T, T>(x.fi + y.fi, x.se + y.se); }// template <class T> pair<T, T> &operator+=(pair<T, T> x, const pair<T, T> &y) {// x = x + y;// return &x;// }// template <class T> pair<T, T> &operator-=(pair<T, T> x, const pair<T, T> &y) {// x = x - y;// return &x;// }template <class T> ll operator*(const pair<T, T> &x, const pair<T, T> &y) { return (ll)x.fi * y.fi + (ll)x.se * y.se; }template <typename T> struct edge {int from, to;T cost;int id;edge(int to, T cost) : from(-1), to(to), cost(cost) {}edge(int from, int to, T cost) : from(from), to(to), cost(cost) {}edge(int from, int to, T cost, int id) : from(from), to(to), cost(cost), id(id) {}constexpr bool operator<(const edge<T> &rhs) const noexcept { return cost < rhs.cost; }edge &operator=(const int &x) {to = x;return *this;}operator int() const { return to; }};template <typename T> using Edges = vector<edge<T>>;using Tree = vector<vector<int>>;using Graph = vector<vector<int>>;template <class T> using Wgraph = vector<vector<edge<T>>>;Graph getG(int n, int m = -1, bool directed = false, int margin = 1) {Tree res(n);if(m == -1) m = n - 1;while(m--) {int a, b;cin >> a >> b;a -= margin, b -= margin;res[a].emplace_back(b);if(!directed) res[b].emplace_back(a);}return move(res);}template <class T> Wgraph<T> getWg(int n, int m = -1, bool directed = false, int margin = 1) {Wgraph<T> res(n);if(m == -1) m = n - 1;while(m--) {int a, b;T c;cin >> a >> b >> c;a -= margin, b -= margin;res[a].emplace_back(b, c);if(!directed) res[b].emplace_back(a, c);}return move(res);}#define i128 __int128_t#define ull unsigned long long int#define TEST\INT(testcases);\while(testcases--)template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {for(auto it = begin(v); it != end(v); ++it) {if(it == begin(v))os << *it;elseos << " " << *it;}return os;}template <class T, class S> ostream &operator<<(ostream &os, const pair<T, S> &p) {os << p.first << " " << p.second;return os;}template <class S, class T> string to_string(pair<S, T> p) { return "(" + to_string(p.first) + "," + to_string(p.second) + ")"; }template <class A> string to_string(A v) {if(v.empty()) return "{}";string ret = "{";for(auto &x : v) ret += to_string(x) + ",";ret.back() = '}';return ret;}string to_string(string s) { return "\"" + s + "\""; }string to_string(char c) { return string(1, c); }#ifdef _LOCALvoid dump() { cerr << endl; }template <class Head, class... Tail> void dump(Head head, Tail... tail) {cerr << to_string(head) << " ";dump(tail...);}#define endl '\n'#undef endl#define debug(x)\cout << #x << ": ";\dump(x)#elsevoid dump() {}template <class Head, class... Tail> void dump(Head head, Tail... tail) {}#define debug(x)#endiftemplate <typename T> static constexpr T inf = numeric_limits<T>::max() / 2;struct Setup_io {Setup_io() {ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);cout << fixed << setprecision(15);}} setup_io;#define drop(s) cout << #s << endl, exit(0)template <int N> struct ndFORarray {std::array<int, N> v;ndFORarray(std::array<int, N> v_) : v(v_) {}struct ndFORitr {const std::array<int, N> &v;std::array<int, N> tmp;bool is_end;ndFORitr(const std::array<int, N> &v_) : v(v_), tmp(), is_end(false) {}bool operator!=(const ndFORitr &) const { return !is_end; }void operator++() {int pos = N - 1;while(pos != -1) {tmp[pos] += 1;if(tmp[pos] == v[pos]) {tmp[pos] = 0;pos -= 1;} else {break;}}if(pos == -1) { is_end = true; }}const std::array<int, N> &operator*() const { return tmp; }};ndFORitr begin() const { return ndFORitr(v); }ndFORitr end() const { return ndFORitr(v); }};struct ndFORvector {std::vector<int> v;ndFORvector(std::vector<int> v_) : v(v_) {}struct ndFORitr {const std::vector<int> &v;std::vector<int> tmp;bool is_end;ndFORitr(const std::vector<int> &v_) : v(v_), tmp(v.size(), 0), is_end(false) {}bool operator!=(const ndFORitr &) const { return !is_end; }void operator++() {int pos = v.size() - 1;while(pos != -1) {tmp[pos] += 1;if(tmp[pos] == v[pos]) {tmp[pos] = 0;pos -= 1;} else {break;}}if(pos == -1) { is_end = true; }}const std::vector<int> &operator*() const { return tmp; }};ndFORitr begin() const { return ndFORitr(v); }ndFORitr end() const { return ndFORitr(v); }};auto ndFOR(std::vector<int> v) { return ndFORvector(v); }template <class... Ts> auto ndFOR(Ts... v) { return ndFORarray<std::tuple_size<std::tuple<Ts...>>::value>({v...}); }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)...); }};#pragma endregion#undef piiint main() {INT(n);STR(s);auto g = getWg<char>(n);int m = si(s);vv(int, num, n, n);int N = 0;rep(i, n) for(auto e : g[i]) num[i][e] = N++;vv(int, dp, m + 1, n * 2);auto pii = [&](int x, int y) { return num[x][y]; };rep(i, n) for(auto e : g[i]) {if(e.cost == s[0])dp[1][pii(i, e)] = 1;elsedp[0][pii(i, e)] = 0;}rep(i, m) {vv(int, sub, n, 2);vi q(N);rep(j, n) for(auto e : g[j]) chmax(dp[i + 1][pii(j, e)], dp[i][pii(j, e)]);REC([&](auto &&f, int x, int p) -> void {auto &res = sub[x];res.resize(2);for(auto e : g[x]) {if(e == p) continue;f(e, x);int k = dp[i][pii(e, x)];chmax(dp[i + 1][pii(e, x)], sub[e][0] + (s[i] == e.cost));chmax(k, sub[e][0]);res.eb(k);sort(all(res), greater{});res.resize(2);q[pii(e, x)] = k;}})(0, -1);REC([&](auto &&f, int x, int p, int v) -> void {auto &res = sub[x];res.eb(v);sort(all(res), greater{});res.resize(2);for(auto e : g[x]) {if(e == p) continue;int k = q[pii(e, x)];int ss;if(k == res[0])ss = res[1];elsess = res[0];chmax(dp[i + 1][pii(x, e)], ss + (e.cost == s[i]));chmax(dp[i + 1][pii(x, e)], dp[i][pii(x, e)]);f(e, x, max(ss, dp[i][pii(x, e)]));}})(0, -1, 0);}int ans = 0;rep(x, m + 1) rep(i, n) for(auto e : g[i]) { chmax(ans, dp[x][pii(i, e)]); }cout << ans << endl;}