結果
問題 | No.5020 Averaging |
ユーザー |
|
提出日時 | 2024-02-25 16:52:50 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 492 ms / 1,000 ms |
コード長 | 4,117 bytes |
コンパイル時間 | 3,681 ms |
コンパイル使用メモリ | 267,820 KB |
実行使用メモリ | 6,548 KB |
スコア | 43,863,633 |
最終ジャッジ日時 | 2024-02-25 16:54:58 |
合計ジャッジ時間 | 30,417 ms |
ジャッジサーバーID (参考情報) |
judge12 / judge15 |
純コード判定しない問題か言語 |
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ファイルパターン | 結果 |
---|---|
other | AC * 50 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i, a, n) for(int i = a; i < n; i++)#define rrep(i, a, n) for(int i = a; i >= n; i--)#define ll long long#define pii pair<int, int>#define pll pair<ll, ll>constexpr ll MOD = 1000000007;constexpr int IINF = 1001001001;constexpr ll INF = 1LL<<60;template<class t,class u> void chmax(t&a,u b){if(a<b)a=b;}template<class t,class u> void chmin(t&a,u b){if(b<a)a=b;}// 問題// https://yukicoder.me/problems/no/5020const int TIME_LIMIT = 490;constexpr ll base = 5e17;const double start_temp = 10000, end_temp = 1000;int main(){auto start_time = chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now().time_since_epoch()).count();random_device seed_gen;mt19937 engine(seed_gen());int n; cin >> n;vector<tuple<ll, ll, ll>> card(n), init(n);rep(i, 0, n){ll a, b; cin >> a >> b;card[i] = {a, b, i};init[i] = {a, b, i};}sort(card.begin(), card.end());vector<pair<ll, ll>> ope;rep(_, 0, 2){rep(__, 0, 25){// 1~25回目は表、26~50回目は裏が最大, 最小となるカードについて操作を行うauto [a, c, i] = card[0];auto [b, d, j] = card[n-1];card[0] = {(a+b)/2, (c+d)/2, i};card[n-1] = {(a+b)/2, (c+d)/2, j};ope.push_back({i, j});sort(card.begin(), card.end());}rep(i, 0, n){auto [a, c, j] = card[i];card[i] = {c, a, j};}}// 1番のカードauto get_card1 = [&](vector<tuple<ll, ll, ll>> card_) -> pair<ll, ll> {rep(i, 0, n){auto [a, c, j] = card_[i];if(!j){return {a, c};}}return {0, 0};};// スコアauto score = [&](pair<ll, ll> card_) -> ll {return (ll)(2e6-1e5*log10(max(abs(card_.first-base), abs(card_.second-base))+1));};// 操作auto simulation = [&](vector<pair<ll, ll>> ope_) -> ll {vector<tuple<ll, ll, ll>> card_ = init;for(auto [u, v]: ope_){auto [a, c, i] = card_[u];auto [b, d, j] = card_[v];card_[u] = {(a+b)/2, (c+d)/2, i};card_[v] = {(a+b)/2, (c+d)/2, j};}return score(get_card1(card_));};ll best_score = simulation(ope);constexpr int ope_size = 50;// 山登りint cnt = 0, tmp = 0;int f1 = 0, f2 = 0;while(true){auto now_time = chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now().time_since_epoch()).count();if(now_time-start_time >= TIME_LIMIT) break;vector<pair<ll, ll>> new_ope = ope;if(f1^f2){int num = engine()%ope_size;int u = 0, v = engine()%(n-1)+1;new_ope[num] = {u, v};}else if(f1&f2){int num = engine()%ope_size;int u = engine()%(n-1)+1, v = engine()%(n-1)+1;while(u == v) v = engine()%(n-1)+1;new_ope[num] = {u, v};}else{int u = engine()%ope_size, v = engine()%ope_size;while(u == v) v = engine()%ope_size;swap(new_ope[u], new_ope[v]);}ll new_score = simulation(new_ope);// 温度関数double temp = start_temp+(end_temp-start_temp)*((double)(now_time-start_time))/(double)TIME_LIMIT;// 遷移確率関数(最大化の場合)double prob = min(1.0, exp((double)(new_score-best_score-1)/temp));// if(cnt%100000 == 0) cout << new_score-best_score << ' ' << temp << ' ' << prob << endl;// 確率probで遷移するif (prob > (engine()%IINF)/(double)IINF) {tmp = cnt;swap(ope, new_ope);swap(best_score, new_score);}cnt++;f2 ^= f1;f1 ^= 1;}//cout << simulation(ope) << ' ' << cnt << endl;// 出力cout << ope.size() << endl;for(auto [u, v]: ope){cout << u+1 << ' ' << v+1 << endl;}return 0;}