結果
| 問題 | No.3418 【絶望】30個並列ごちゃ混ぜHit&Blowで遊ぼう! |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-12-25 13:46:16 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 6,224 bytes |
| 記録 | |
| コンパイル時間 | 2,265 ms |
| コンパイル使用メモリ | 203,076 KB |
| 実行使用メモリ | 42,900 KB |
| スコア | 0 |
| 最終ジャッジ日時 | 2025-12-25 13:46:32 |
| 合計ジャッジ時間 | 15,124 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | TLE * 1 -- * 99 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <random>
#include <chrono>
using namespace std;
typedef uint8_t ResultCode;
struct Guess {
int d[5];
int mask;
};
// ヒット・ブロー判定(最速化)
inline ResultCode get_hb_code(const Guess& q, const Guess& t) {
int h = (q.d[0] == t.d[0]) + (q.d[1] == t.d[1]) + (q.d[2] == t.d[2]) + (q.d[3] == t.d[3]) + (q.d[4] == t.d[4]);
int common = __builtin_popcount(q.mask & t.mask);
return (ResultCode)(h * 6 + (common - h));
}
struct QueryHistory {
int guess_idx;
int freq[36];
};
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
auto start_time = chrono::steady_clock::now();
auto get_elapsed = [&]() {
return chrono::duration_cast<chrono::milliseconds>(chrono::steady_clock::now() - start_time).count();
};
mt19937 rng(42);
vector<Guess> all_patterns;
all_patterns.reserve(30240);
for (int i = 0; i <= 99999; i++) {
int tmp = i, m = 0, digs[5];
bool ok = true;
for (int j = 4; j >= 0; j--) {
digs[j] = tmp % 10;
if (m & (1 << digs[j])) { ok = false; break; }
m |= (1 << digs[j]);
tmp /= 10;
}
if (ok) {
Guess g; g.mask = m;
for (int j = 0; j < 5; j++) g.d[j] = digs[j];
all_patterns.push_back(g);
}
}
vector<int> candidates;
for (int i = 0; i < (int)all_patterns.size(); i++) candidates.push_back(i);
vector<bool> is_solved(all_patterns.size(), false);
vector<int> solved_indices;
vector<QueryHistory> history;
int solved_count = 0;
double log_table[30241];
for (int i = 0; i <= 30240; i++) log_table[i] = (i <= 1) ? 0 : log2((double)i);
while (solved_count < 30) {
int best_guess_idx = -1;
if (candidates.size() <= (size_t)(30 - solved_count)) {
for (int c : candidates) if (!is_solved[c]) { best_guess_idx = c; break; }
} else if (history.empty()) {
// 初手は 01234
for(int i=0; i<(int)all_patterns.size(); ++i) {
if(all_patterns[i].d[0]==0 && all_patterns[i].d[1]==1 && all_patterns[i].d[2]==2 && all_patterns[i].d[3]==3) {
best_guess_idx = i; break;
}
}
} else {
// --- 時間管理の修正 ---
long long now = get_elapsed();
// 残り時間の1/10〜1/15をこのターンの探索に充てる
long long turn_limit = now + (4900 - now) / 10;
double max_entropy = -1.0;
int sample_size = (candidates.size() < 1000) ? (int)candidates.size() : 400;
vector<int> samples;
if (candidates.size() <= (size_t)sample_size) samples = candidates;
else {
for (int i = 0; i < sample_size; i++) samples.push_back(candidates[rng() % candidates.size()]);
}
int attempts = 0;
while (get_elapsed() < turn_limit) {
attempts++;
int q_idx;
if (rng() % 10 < 7) q_idx = candidates[rng() % candidates.size()];
else q_idx = rng() % all_patterns.size();
if (is_solved[q_idx]) continue;
int counts[36] = {0};
for (int s_idx : samples) counts[get_hb_code(all_patterns[q_idx], all_patterns[s_idx])]++;
double entropy = 0;
for (int j = 0; j < 36; j++) if (counts[j] > 0) entropy -= (double)counts[j] * log_table[counts[j]];
if (entropy > max_entropy) {
max_entropy = entropy;
best_guess_idx = q_idx;
}
// 十分に探索したら抜ける(時間を節約)
if (candidates.size() < 500 && attempts > 1000) break;
if (attempts > 3000) break;
}
}
if (best_guess_idx == -1) best_guess_idx = candidates[0];
// クエリ出力
for (int i = 0; i < 5; i++) cout << all_patterns[best_guess_idx].d[i];
cout << endl;
// レスポンス取得
QueryHistory cur_h;
cur_h.guess_idx = best_guess_idx;
for (int j = 0; j < 36; j++) cur_h.freq[j] = 0;
for (int i = 0; i < 30; i++) {
int h, b;
if(!(cin >> h >> b)) return 0;
if (h == -1) return 0;
cur_h.freq[h * 6 + b]++;
}
history.push_back(cur_h);
// 解決状況更新
if (!is_solved[best_guess_idx] && history.back().freq[30] > (int)solved_indices.size()) {
is_solved[best_guess_idx] = true;
solved_indices.push_back(best_guess_idx);
}
solved_count = history.back().freq[30];
if (solved_count == 30) break;
// --- フィルタリング ---
vector<QueryHistory> unknown_history = history;
for (auto &uh : unknown_history) {
for (int s_idx : solved_indices) {
if (uh.guess_idx == s_idx) uh.freq[30]--;
else uh.freq[get_hb_code(all_patterns[uh.guess_idx], all_patterns[s_idx])]--;
}
}
vector<int> next_candidates;
next_candidates.reserve(candidates.size());
for (int c_idx : candidates) {
if (is_solved[c_idx]) continue;
bool possible = true;
for (const auto &uh : unknown_history) {
ResultCode code = get_hb_code(all_patterns[uh.guess_idx], all_patterns[c_idx]);
if (uh.freq[code] <= 0) {
possible = false;
break;
}
}
if (possible) next_candidates.push_back(c_idx);
}
candidates = move(next_candidates);
// 候補がいなくなったら、まだ解決していない全パターンから再構成(安全策)
if (candidates.empty() && solved_count < 30) {
for(int i=0; i<(int)all_patterns.size(); ++i) {
if(!is_solved[i]) candidates.push_back(i);
}
}
}
return 0;
}