結果
問題 | No.5020 Averaging |
ユーザー | A8pf |
提出日時 | 2024-02-25 16:36:47 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 835 ms / 1,000 ms |
コード長 | 5,879 bytes |
コンパイル時間 | 2,916 ms |
コンパイル使用メモリ | 234,272 KB |
実行使用メモリ | 6,676 KB |
スコア | 20,199,093 |
最終ジャッジ日時 | 2024-02-25 16:38:22 |
合計ジャッジ時間 | 45,686 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge10 |
純コード判定しない問題か言語 |
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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 | 797 ms
6,676 KB |
testcase_01 | AC | 824 ms
6,676 KB |
testcase_02 | AC | 801 ms
6,676 KB |
testcase_03 | AC | 795 ms
6,676 KB |
testcase_04 | AC | 803 ms
6,676 KB |
testcase_05 | AC | 798 ms
6,676 KB |
testcase_06 | AC | 814 ms
6,676 KB |
testcase_07 | AC | 806 ms
6,676 KB |
testcase_08 | AC | 830 ms
6,676 KB |
testcase_09 | AC | 795 ms
6,676 KB |
testcase_10 | AC | 802 ms
6,676 KB |
testcase_11 | AC | 812 ms
6,676 KB |
testcase_12 | AC | 797 ms
6,676 KB |
testcase_13 | AC | 800 ms
6,676 KB |
testcase_14 | AC | 814 ms
6,676 KB |
testcase_15 | AC | 801 ms
6,676 KB |
testcase_16 | AC | 835 ms
6,676 KB |
testcase_17 | AC | 797 ms
6,676 KB |
testcase_18 | AC | 814 ms
6,676 KB |
testcase_19 | AC | 795 ms
6,676 KB |
testcase_20 | AC | 807 ms
6,676 KB |
testcase_21 | AC | 795 ms
6,676 KB |
testcase_22 | AC | 796 ms
6,676 KB |
testcase_23 | AC | 792 ms
6,676 KB |
testcase_24 | AC | 791 ms
6,676 KB |
testcase_25 | AC | 794 ms
6,676 KB |
testcase_26 | AC | 808 ms
6,676 KB |
testcase_27 | AC | 806 ms
6,676 KB |
testcase_28 | AC | 802 ms
6,676 KB |
testcase_29 | AC | 785 ms
6,676 KB |
testcase_30 | AC | 799 ms
6,676 KB |
testcase_31 | AC | 797 ms
6,676 KB |
testcase_32 | AC | 795 ms
6,676 KB |
testcase_33 | AC | 809 ms
6,676 KB |
testcase_34 | AC | 801 ms
6,676 KB |
testcase_35 | AC | 807 ms
6,676 KB |
testcase_36 | AC | 806 ms
6,676 KB |
testcase_37 | AC | 808 ms
6,676 KB |
testcase_38 | AC | 811 ms
6,676 KB |
testcase_39 | AC | 803 ms
6,676 KB |
testcase_40 | AC | 802 ms
6,676 KB |
testcase_41 | AC | 796 ms
6,676 KB |
testcase_42 | AC | 799 ms
6,676 KB |
testcase_43 | AC | 808 ms
6,676 KB |
testcase_44 | AC | 798 ms
6,676 KB |
testcase_45 | AC | 804 ms
6,676 KB |
testcase_46 | AC | 798 ms
6,676 KB |
testcase_47 | AC | 803 ms
6,676 KB |
testcase_48 | AC | 805 ms
6,676 KB |
testcase_49 | AC | 808 ms
6,676 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; using ull=unsigned long long; std::mt19937 mt_for_action(0); // 行動選択用の乱数生成器を初期化 // 128bit整数 std::ostream &operator<<(std::ostream &dest, __int128_t value) { std::ostream::sentry s(dest); if (s) { __uint128_t tmp = value < 0 ? -value : value; char buffer[128]; char *d = std::end(buffer); do { --d; *d = "0123456789"[tmp % 10]; tmp /= 10; } while (tmp != 0); if (value < 0) { --d; *d = '-'; } int len = std::end(buffer) - d; if (dest.rdbuf()->sputn(d, len) != len) { dest.setstate(std::ios_base::badbit); } } return dest; } __int128 parse(string &s) { __int128 ret = 0; for (int i = 0; i < s.length(); i++) if ('0' <= s[i] && s[i] <= '9') ret = 10 * ret + s[i] - '0'; return ret; } // 128bit整数ここまで constexpr int MAX_TURN = 50; constexpr __int128 TARGET = 500000000000000000; struct Card { __int128 omote, ura; }; class GameState { private: int _turn; vector<Card> _cards; vector<pair<int, int>> _commandHistory; public: __int128 nowScore; pair<int, int> first_action_; GameState(){}; GameState(vector<unsigned long long> omotes, vector<unsigned long long> uras): _turn(0), nowScore(0) { for (int i = 0; i < omotes.size(); i++) { _cards.push_back({omotes[i], uras[i]}); } } __int128 getEstimatedScore() { __int128 score = 0; // 1枚目のみ別に評価 __int128 omotediff = TARGET - _cards[0].omote; if (omotediff > 0) { omotediff *= -1; } score += omotediff; __int128 uradiff = TARGET - _cards[0].ura; if (uradiff > 0) { uradiff *= -1; } score += uradiff; // 満点ならその時点で終了 if (omotediff == 0 && uradiff == 0) { score += 9999999999999999; } // 2枚目以降 const Card OTHER_TARGET = { TARGET * 2 - _cards[0].omote, TARGET * 2 - _cards[0].ura }; for (int i = 1; i < _cards.size(); i++) { __int128 omotediff = OTHER_TARGET.omote - _cards[i].omote; if (omotediff > 0) { omotediff *= -1; } score += omotediff * (_turn / 2 + 1); __int128 uradiff = OTHER_TARGET.ura - _cards[i].ura; if (uradiff > 0) { uradiff *= -1; } score += uradiff * (_turn / 2 + 1); // 満点ならその時点で終了 if (omotediff == 0 && uradiff == 0) { score += 99999999; } } return score; } // 1ターン進める void advance(int u, int v) { _commandHistory.push_back({u, v}); _turn++; Card newCard = {(_cards[u].omote + _cards[v].omote) / 2, (_cards[u].ura + _cards[v].ura) / 2}; _cards[u] = newCard; _cards[v] = newCard; nowScore = getEstimatedScore(); } // 合法手を列挙する vector<pair<int, int>> legalActions() const { vector<pair<int, int>> ret; for (int i = 1; i < _cards.size(); i++) { ret.push_back({0, i}); } return ret; } // 1番目に触らないランダムなアクションを返す pair<int, int> randomAction() const { uniform_int_distribution<int> dist(1, (int)_cards.size() - 1); int u = dist(mt_for_action); int v = dist(mt_for_action); while (u == v) { v = dist(mt_for_action); } return {u, v}; } // ゲームが終了しているかどうか bool isDone() const { return _turn == MAX_TURN; } // 結果の出力を行う string outputCommand() { stringstream ss; ss << _commandHistory.size() << endl; for (auto command : _commandHistory) { ss << command.first + 1 << " " << command.second + 1 << endl; } return ss.str(); } // 現在の実スコアを出力する double getScore() const { ull v = max( max((ull)_cards[0].omote, (ull)TARGET) - min((ull)_cards[0].omote, (ull)TARGET), max((ull)_cards[0].ura, (ull)TARGET) - min((ull)_cards[0].ura, (ull)TARGET) ); long long score = 2000000 - 100000 * log10(static_cast<long double>(v)); return score; } }; bool operator<(const GameState &state1, const GameState &state2) { return state1.nowScore < state2.nowScore; } pair<int,int> beamSearchAction(const GameState &initState, const int beamWidth, const int beamDepth) { priority_queue<GameState> nowBeam; GameState bestState; nowBeam.push(initState); for (int t = 0; t < beamDepth; t++) { std::priority_queue<GameState> nextBeam; for (int i = 0; i < beamWidth; i++) { if (nowBeam.empty()) break; GameState nowState = nowBeam.top(); nowBeam.pop(); auto legal_actions = nowState.legalActions(); for (const auto &action : legal_actions) { GameState nextState = nowState; nextState.advance(action.first, action.second); if (t == 0) nextState.first_action_ = action; nextBeam.push(nextState); } } nowBeam = nextBeam; bestState = nowBeam.top(); if (bestState.isDone()) { break; } } if (bestState.getScore() < initState.getScore()) { auto random_action = initState.randomAction(); return random_action; } return bestState.first_action_; } pair<vector<unsigned long long>, vector<unsigned long long>> getFromInput() { int n; cin >> n; vector<unsigned long long> omotes(n), uras(n); for (int i = 0; i < n; i++) { cin >> omotes[i] >> uras[i]; } return {omotes, uras}; } int main() { // 本番用 auto input = getFromInput(); GameState state(input.first, input.second); while (!state.isDone()) { auto action = beamSearchAction(state, 15, 35); state.advance(action.first, action.second); // cerr<<state.nowScore<<endl; // cerr<<state.getScore()<<endl; } cout << state.outputCommand(); }