結果
問題 | No.2500 Products in a Range |
ユーザー |
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提出日時 | 2023-10-13 22:12:47 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 190 ms / 2,000 ms |
コード長 | 11,688 bytes |
コンパイル時間 | 1,724 ms |
コンパイル使用メモリ | 145,492 KB |
最終ジャッジ日時 | 2025-02-17 07:20:43 |
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 61 |
ソースコード
/* #region Head */// #include <bits/stdc++.h>#include <algorithm>#include <array>#include <bitset>#include <cassert> // assert.h#include <cmath> // math.h#include <cstring>#include <ctime>#include <deque>#include <fstream>#include <functional>#include <iomanip>#include <iostream>#include <list>#include <map>#include <memory>#include <numeric>#include <queue>#include <random>#include <set>#include <sstream>#include <stack>#include <string>#include <unordered_map>#include <unordered_set>#include <vector>using namespace std;using ll = long long;using ull = unsigned long long;using ld = long double;using pll = pair<ll, ll>;template <class T> using vc = vector<T>;template <class T> using vvc = vc<vc<T>>;using vll = vc<ll>;using vvll = vvc<ll>;using vld = vc<ld>;using vvld = vvc<ld>;using vs = vc<string>;using vvs = vvc<string>;template <class T, class U> using um = unordered_map<T, U>;template <class T> using pq = priority_queue<T>;template <class T> using pqa = priority_queue<T, vc<T>, greater<T>>;template <class T> using us = unordered_set<T>;#define TREP(T, i, m, n) for (T i = (m), i##_len = (T)(n); i < i##_len; ++(i))#define TREPM(T, i, m, n) for (T i = (m), i##_max = (T)(n); i <= i##_max; ++(i))#define TREPR(T, i, m, n) for (T i = (m), i##_min = (T)(n); i >= i##_min; --(i))#define TREPD(T, i, m, n, d) for (T i = (m), i##_len = (T)(n); i < i##_len; i += (d))#define TREPMD(T, i, m, n, d) for (T i = (m), i##_max = (T)(n); i <= i##_max; i += (d))#define REP(i, m, n) for (ll i = (m), i##_len = (ll)(n); i < i##_len; ++(i))#define REPM(i, m, n) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; ++(i))#define REPR(i, m, n) for (ll i = (m), i##_min = (ll)(n); i >= i##_min; --(i))#define REPD(i, m, n, d) for (ll i = (m), i##_len = (ll)(n); i < i##_len; i += (d))#define REPMD(i, m, n, d) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; i += (d))#define REPI(itr, ds) for (auto itr = ds.begin(); itr != ds.end(); itr++)#define REPIR(itr, ds) for (auto itr = ds.rbegin(); itr != ds.rend(); itr++)#define ALL(x) begin(x), end(x)#define SIZE(x) ((ll)(x).size())#define ISIZE(x) ((int)(x).size())#define PERM(c) \sort(ALL(c)); \for (bool c##p = 1; c##p; c##p = next_permutation(ALL(c)))#define UNIQ(v) v.erase(unique(ALL(v)), v.end());#define CEIL(a, b) (((a) + (b)-1) / (b))#define endl '\n'constexpr ll INF = 1'010'000'000'000'000'017LL;constexpr int IINF = 1'000'000'007LL;constexpr ll MOD = 1'000'000'007LL; // 1e9 + 7// constexpr ll MOD = 998244353;constexpr ld EPS = 1e-12;constexpr ld PI = 3.14159265358979323846;template <typename T> istream &operator>>(istream &is, vc<T> &vec) { // vector 入力for (T &x : vec) is >> x;return is;}template <typename T> ostream &operator<<(ostream &os, const vc<T> &vec) { // vector 出力 (for dump)os << "{";REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "" : ", ");os << "}";return os;}template <typename T> ostream &operator>>(ostream &os, const vc<T> &vec) { // vector 出力 (inline)REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "\n" : " ");return os;}template <typename T, size_t _Nm> istream &operator>>(istream &is, array<T, _Nm> &arr) { // array 入力REP(i, 0, SIZE(arr)) is >> arr[i];return is;}template <typename T, size_t _Nm> ostream &operator<<(ostream &os, const array<T, _Nm> &arr) { // array 出力 (for dump)os << "{";REP(i, 0, SIZE(arr)) os << arr[i] << (i == i_len - 1 ? "" : ", ");os << "}";return os;}template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &pair_var) { // pair 入力is >> pair_var.first >> pair_var.second;return is;}template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &pair_var) { // pair 出力os << "(" << pair_var.first << ", " << pair_var.second << ")";return os;}// map, um, set, us 出力template <class T> ostream &out_iter(ostream &os, const T &map_var) {os << "{";REPI(itr, map_var) {os << *itr;auto itrcp = itr;if (++itrcp != map_var.end()) os << ", ";}return os << "}";}template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &map_var) {return out_iter(os, map_var);}template <typename T, typename U> ostream &operator<<(ostream &os, const um<T, U> &map_var) {os << "{";REPI(itr, map_var) {auto [key, value] = *itr;os << "(" << key << ", " << value << ")";auto itrcp = itr;if (++itrcp != map_var.end()) os << ", ";}os << "}";return os;}template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var) { return out_iter(os, set_var); }template <typename T> ostream &operator<<(ostream &os, const us<T> &set_var) { return out_iter(os, set_var); }template <typename T> ostream &operator<<(ostream &os, const pq<T> &pq_var) {pq<T> pq_cp(pq_var);os << "{";if (!pq_cp.empty()) {os << pq_cp.top(), pq_cp.pop();while (!pq_cp.empty()) os << ", " << pq_cp.top(), pq_cp.pop();}return os << "}";}// tuple 出力template <size_t N = 0, bool end_line = false, typename... Args> ostream &operator<<(ostream &os, tuple<Args...> &a) {if constexpr (N < std::tuple_size_v<tuple<Args...>>) {os << get<N>(a);if constexpr (N + 1 < std::tuple_size_v<tuple<Args...>>) {os << ' ';} else if constexpr (end_line) {os << '\n';}return operator<< <N + 1, end_line>(os, a);}return os;}template <typename... Args> void print_tuple(tuple<Args...> &a) { operator<< <0, true>(std::cout, a); }void pprint() { std::cout << endl; }template <class Head, class... Tail> void pprint(Head &&head, Tail &&...tail) {std::cout << head;if (sizeof...(Tail) > 0) std::cout << ' ';pprint(move(tail)...);}// dump#define DUMPOUT cerrvoid dump_func() { DUMPOUT << endl; }template <class Head, class... Tail> void dump_func(Head &&head, Tail &&...tail) {DUMPOUT << head;if (sizeof...(Tail) > 0) DUMPOUT << ", ";dump_func(move(tail)...);}// chmax (更新「される」かもしれない値が前)template <typename T, typename U, typename Comp = less<>> bool chmax(T &xmax, const U &x, Comp comp = {}) {if (comp(xmax, x)) {xmax = x;return true;}return false;}// chmin (更新「される」かもしれない値が前)template <typename T, typename U, typename Comp = less<>> bool chmin(T &xmin, const U &x, Comp comp = {}) {if (comp(x, xmin)) {xmin = x;return true;}return false;}// ローカル用#ifndef ONLINE_JUDGE#define DEBUG_#endif#ifndef MYLOCAL#undef DEBUG_#endif#ifdef DEBUG_#define DEB#define dump(...) \DUMPOUT << " " << string(#__VA_ARGS__) << ": " \<< "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]" << endl \<< " ", \dump_func(__VA_ARGS__)#else#define DEB if (false)#define dump(...)#endif#define VAR(type, ...) \type __VA_ARGS__; \assert((std::cin >> __VA_ARGS__));template <typename T> istream &operator,(istream &is, T &rhs) { return is >> rhs; }template <typename T> ostream &operator,(ostream &os, const T &rhs) { return os << ' ' << rhs; }struct AtCoderInitialize {static constexpr int IOS_PREC = 15;static constexpr bool AUTOFLUSH = false;AtCoderInitialize() {ios_base::sync_with_stdio(false), std::cin.tie(nullptr), std::cout.tie(nullptr);std::cout << fixed << setprecision(IOS_PREC);if (AUTOFLUSH) std::cout << unitbuf;}} ATCODER_INITIALIZE;void Yn(bool p) { std::cout << (p ? "Yes" : "No") << endl; }void YN(bool p) { std::cout << (p ? "YES" : "NO") << endl; }template <typename T> constexpr void operator--(vc<T> &v, int) noexcept {for (int i = 0; i < ISIZE(v); ++i) v[i]--;}template <typename T> constexpr void operator++(vc<T> &v, int) noexcept {for (int i = 0; i < ISIZE(v); ++i) v[i]++;}/* #endregion */// #include <atcoder/all>// using namespace atcoder;template <typename val_t = char>array<int, 3> maximal_square( //const vc<vc<val_t>> &matrix, //const val_t &valid_value = '1' // 正方形として使えるマスが 1) {const int h = ISIZE(matrix);if (h == 0) {return {0, -1, -1};}const int w = ISIZE(matrix[0]);if (w == 0) {return {0, -1, -1};}// dp[i][j] := i行目j列目のマスを右下とする正方形の一辺の最大長さvc<vc<int>> dp(h, vc<int>(w, 0));int max_width = 0;int argma_i = -1, argma_j = -1;TREP(int, i, 0, h) TREP(int, j, 0, w) {if (matrix[i][j] != valid_value) continue;if (i == 0 || j == 0) {dp[i][j] = 1;if (chmax(max_width, dp[i][j])) {argma_i = i, argma_j = j;}continue;}dp[i][j] = min({dp[i - 1][j - 1], dp[i - 1][j], dp[i][j - 1]}) + 1;// 追加if (i == j) {if (chmax(max_width, dp[i][j])) {argma_i = i, argma_j = j;}}}return {max_width, argma_i, argma_j};}// Problemvoid solve() {VAR(ll, n, l, r);vll a(n);cin >> a;sort(ALL(a));dump(a);// 掛け算の表を考えると,a がソート済みなら,行内は単調性があるので// 1つの区間のみが条件を満たす.// → 最大正方形を求める問題に帰着できる// でも対角成分だけは単調性を満たさないので,単純にはできない.vc<vc<char>> table(n, vc<char>(n, '0'));// vvll prod(n, vll(n));REP(i, 0, n) {REP(j, 0, n) {// 自分自身なら OK とするif (i == j) {table[i][j] = '1';} else {ll p = a[i] * a[j];if (l <= p && p <= r) {table[i][j] = '1';}}// prod[i][j] = a[i] * a[j];}// cerr >> table[i];}// cerr << "-------" << endl;// REP(i, 0, n) cerr >> prod[i];auto [w, i, j] = maximal_square(table, '1');// dump(w, i, j);if (w == 1) {// w=2 で条件を満たすものがないか探すREP(i, 0, n) {REP(j, 0, n) {// 自分自身なら OK とするif (i == j) {continue;} else {ll p = a[i] * a[j];if (l <= p && p <= r) {pprint(2);return;}}// prod[i][j] = a[i] * a[j];}// cerr >> table[i];}}pprint(w);}// entry pointint main() {solve();return 0;}