結果
問題 |
No.5005 3-SAT
|
ユーザー |
![]() |
提出日時 | 2022-03-29 02:46:12 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,914 ms / 2,000 ms |
コード長 | 2,868 bytes |
コンパイル時間 | 665 ms |
実行使用メモリ | 6,952 KB |
スコア | 99,077 |
最終ジャッジ日時 | 2022-04-29 13:50:01 |
合計ジャッジ時間 | 197,801 ms |
ジャッジサーバーID (参考情報) |
judge13 / 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 * 100 |
ソースコード
#include <bitset> #include <iostream> #include <random> using namespace std; class xrand { uint64_t x; public: using result_type = uint32_t; static constexpr result_type min() { return numeric_limits<result_type>::min(); } static constexpr result_type max() { return numeric_limits<result_type>::max(); } xrand(uint64_t k) : x(k) {} xrand() : xrand(1) {} result_type operator()() { x ^= x << 9; x ^= x >> 7; return (x * 0x123456789abcdef) >> 32; } }; constexpr int n = 256, len = 2048; uint32_t a[len], b[len], c[len], a1[len], b1[len], c1[len]; xrand rng; uniform_int_distribution<int> dist(0, n - 1), dist2(0, 1); uniform_real_distribution<double> d1(0, 1); int calc_score(const bitset<n> &s) { for (int i = 0; i < len; i++) { if (s[a[i]] != a1[i] and s[b[i]] != b1[i] and s[c[i]] != c1[i]) { return i; } } return len; } int main() { const clock_t start = clock(); for (int i = 0; i < len; i++) { cin >> a[i] >> b[i] >> c[i] >> a1[i] >> b1[i] >> c1[i]; } bitset<n> best, s; int best_score = calc_score(best), prev_score = best_score; constexpr double start_temp = 1, end_temp = 0.1; while (true) { const double phase = (clock() - start) / (1.9 * CLOCKS_PER_SEC); if (phase >= 1) break; const double temp = start_temp * pow(end_temp / start_temp, phase); bitset<n> locked; for (int i = 0; i < len; i++) { if (s[a[i]] == a1[i] and locked[a[i]]) continue; if (s[b[i]] == b1[i] and locked[b[i]]) continue; if (s[c[i]] == c1[i] and locked[c[i]]) continue; if (s[a[i]] == a1[i]) { locked.set(a[i]); } else if (s[b[i]] == b1[i]) { locked.set(b[i]); } else if (s[c[i]] == c1[i]) { locked.set(c[i]); } else if (not locked[a[i]]) { s.flip(a[i]); locked.set(a[i]); } else if (not locked[b[i]]) { s.flip(b[i]); locked.set(b[i]); } else if (not locked[c[i]]) { s.flip(c[i]); locked.set(c[i]); } else { break; } } for (int i = 0; i < 100; i++) { const int idx = dist(rng); s.flip(idx); const int score = calc_score(s); const double prob = exp(min(0, score - prev_score) / temp); if (prob < 1 and d1(rng) >= prob) { s.flip(idx); } else { prev_score = score; if (score > best_score) { best_score = score; best = s; } } } } cout << best << endl; return 0; }