結果
問題 | No.5020 Averaging |
ユーザー | Godai Takashina |
提出日時 | 2024-02-25 17:37:07 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 954 ms / 1,000 ms |
コード長 | 3,100 bytes |
コンパイル時間 | 1,250 ms |
コンパイル使用メモリ | 108,716 KB |
実行使用メモリ | 6,676 KB |
スコア | 78,235,193 |
最終ジャッジ日時 | 2024-02-25 17:38:00 |
合計ジャッジ時間 | 52,316 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge11 |
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 | 953 ms
6,676 KB |
testcase_01 | AC | 953 ms
6,676 KB |
testcase_02 | AC | 953 ms
6,676 KB |
testcase_03 | AC | 954 ms
6,676 KB |
testcase_04 | AC | 954 ms
6,676 KB |
testcase_05 | AC | 954 ms
6,676 KB |
testcase_06 | AC | 953 ms
6,676 KB |
testcase_07 | AC | 954 ms
6,676 KB |
testcase_08 | AC | 954 ms
6,676 KB |
testcase_09 | AC | 954 ms
6,676 KB |
testcase_10 | AC | 954 ms
6,676 KB |
testcase_11 | AC | 954 ms
6,676 KB |
testcase_12 | AC | 954 ms
6,676 KB |
testcase_13 | AC | 954 ms
6,676 KB |
testcase_14 | AC | 954 ms
6,676 KB |
testcase_15 | AC | 953 ms
6,676 KB |
testcase_16 | AC | 953 ms
6,676 KB |
testcase_17 | AC | 954 ms
6,676 KB |
testcase_18 | AC | 954 ms
6,676 KB |
testcase_19 | AC | 954 ms
6,676 KB |
testcase_20 | AC | 954 ms
6,676 KB |
testcase_21 | AC | 953 ms
6,676 KB |
testcase_22 | AC | 954 ms
6,676 KB |
testcase_23 | AC | 954 ms
6,676 KB |
testcase_24 | AC | 954 ms
6,676 KB |
testcase_25 | AC | 954 ms
6,676 KB |
testcase_26 | AC | 953 ms
6,676 KB |
testcase_27 | AC | 954 ms
6,676 KB |
testcase_28 | AC | 954 ms
6,676 KB |
testcase_29 | AC | 954 ms
6,676 KB |
testcase_30 | AC | 954 ms
6,676 KB |
testcase_31 | AC | 953 ms
6,676 KB |
testcase_32 | AC | 954 ms
6,676 KB |
testcase_33 | AC | 954 ms
6,676 KB |
testcase_34 | AC | 954 ms
6,676 KB |
testcase_35 | AC | 954 ms
6,676 KB |
testcase_36 | AC | 952 ms
6,676 KB |
testcase_37 | AC | 954 ms
6,676 KB |
testcase_38 | AC | 954 ms
6,676 KB |
testcase_39 | AC | 954 ms
6,676 KB |
testcase_40 | AC | 954 ms
6,676 KB |
testcase_41 | AC | 954 ms
6,676 KB |
testcase_42 | AC | 954 ms
6,676 KB |
testcase_43 | AC | 953 ms
6,676 KB |
testcase_44 | AC | 954 ms
6,676 KB |
testcase_45 | AC | 954 ms
6,676 KB |
testcase_46 | AC | 953 ms
6,676 KB |
testcase_47 | AC | 953 ms
6,676 KB |
testcase_48 | AC | 954 ms
6,676 KB |
testcase_49 | AC | 954 ms
6,676 KB |
ソースコード
#include <iostream> #include <vector> #include <random> #include <chrono> #include <cmath> constexpr int max_swap = 50; static int n; static std::mt19937 mt(0); static std::uniform_real_distribution<> uniform(0.,1.); static std::vector<long> a, b; using Entry = std::pair<int, int>; using Solution = std::vector<Entry>; long calc_score(const Solution& ans, const std::vector<long>& a, const std::vector<long>& b) { std::vector<long> aa = a; std::vector<long> bb = b; for (auto [u,v] : ans) { long v1 = (aa[u] + aa[v])/2; long v2 = (bb[u] + bb[v])/2; aa[u] = v1; aa[v] = v1; bb[u] = v2; bb[v] = v2; } double v1 = std::abs(aa[0] - 5*1e17); double v2 = std::abs(bb[0] - 5*1e17); long score = 2000000L - 100000L * std::log10(std::max(v1, v2) + 1); return score; } void print_ans(const Solution& ans) { std::cout << ans.size() << std::endl; for (auto [u,v] : ans) { std::cout << u+1 << " " << v+1 << std::endl; } } void debug_print_ans(const Solution& ans) { for (auto [u,v] : ans) { std::cerr << "(" << u << "," << v << ") "; } std::cerr << "score = " << calc_score(ans, a, b) << std::endl; } auto initial_ans(int n) { constexpr int m = 50; std::vector<Entry> ans; for (int i = 1; i < n; i++) { ans.push_back(Entry{0,i}); } return ans; } void annealing(Solution& ans) { std::cerr << "annealing()" << std::endl; constexpr int m = 50; long best_score = calc_score(ans, a, b); auto start_time = std::chrono::steady_clock::now(); const double duration = 950; // msec const double start_temp = 10000; const double end_temp = 1000; while (true) { auto time = std::chrono::steady_clock::now(); auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(time - start_time).count(); if (elapsed > duration) { break; } double temp = start_temp + (end_temp - start_temp) * (static_cast<double>(elapsed) / duration); // swap random two entries if (ans.size() == 0) continue; auto i = mt() % ans.size(); auto j = mt() % ans.size(); if (i == j) continue; std::swap(ans[i], ans[j]); long score = calc_score(ans, a, b); double ratio = std::exp((score - best_score) / temp); double dice = uniform(mt); if (dice < ratio) { best_score = score; } else { std::swap(ans[i], ans[j]); } } } int main() { std::cin >> n; a.resize(n); b.resize(n); for (int i = 0; i < n; i++) { std::cin >> a[i] >> b[i]; } auto ans = initial_ans(n); std::cerr << "-----------------" << std::endl; std::cerr << "initial: "; debug_print_ans(ans); std::cerr << "-----------------" << std::endl; annealing(ans); std::cerr << "annealing: "; debug_print_ans(ans); std::cerr << "-----------------" << std::endl; std::cerr << "Final score: " << calc_score(ans, a, b) << std::endl; print_ans(ans); }