結果
問題 | No.1804 Intersection of LIS |
ユーザー |
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提出日時 | 2022-01-07 23:12:36 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 173 ms / 2,000 ms |
コード長 | 1,909 bytes |
コンパイル時間 | 2,097 ms |
コンパイル使用メモリ | 200,616 KB |
最終ジャッジ日時 | 2025-01-27 09:46:40 |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 37 |
ソースコード
#include <bits/stdc++.h>using namespace std;#include <atcoder/modint>using namespace atcoder;//using mint = modint998244353;using mint = modint1000000007;using ll = long long;using ld = long double;using pll = pair<ll, ll>;using tlll = tuple<ll, ll, ll>;constexpr ll INF = 1LL << 60;template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}ll safemod(ll A, ll M) {return (A % M + M) % M;}ll divfloor(ll A, ll B) {if (B < 0) {return divfloor(-A, -B);} return (A - safemod(A, B)) / B;}ll divceil(ll A, ll B) {if (B < 0) {return divceil(-A, -B);} return divfloor(A + B - 1, B);}#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)int main(){ll N;cin >> N;vector<ll> P(N);for (ll i = 0; i < N; i++){cin >> P.at(i);}vector<ll> dp;vector<ll> use(N);for (ll i = 0; i < N; i++){ll p = P.at(i);auto it = lower_bound(dp.begin(), dp.end(), p);use.at(i) = it - dp.begin();if (it == dp.end())dp.push_back(p);else*it = p;}ll L = dp.size();vector<vector<ll>> used(L);vector<ll> usedmax(L + 1, 0);usedmax.at(L) = INF;ll cnt = L - 1;for (ll i = N - 1; i >= 0; i--){ll j = use.at(i);if (j >= cnt && P.at(i) < usedmax.at(j + 1)){used.at(j).push_back(P.at(i));chmax(usedmax.at(j), P.at(i));if (j == cnt)cnt--;}}/*for (ll i = 0; i < L; i++){for (auto u : used.at(i))cerr << u << " ";cerr << endl;}//*/vector<ll> ans;for (ll i = 0; i < L; i++){if (used.at(i).size() == 1)ans.push_back(used.at(i).front());}ll K = ans.size();cout << K << endl;for (ll i = 0; i < K; i++){cout << ans.at(i);if (i < K - 1)cout << ' ';}cout << endl;}