結果

問題 No.5006 Hidden Maze
ユーザー maimai
提出日時 2022-06-12 17:25:25
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 91 ms / 2,000 ms
コード長 12,848 bytes
コンパイル時間 4,170 ms
実行使用メモリ 22,868 KB
スコア 67,965
平均クエリ数 321.35
最終ジャッジ日時 2022-06-12 17:25:41
合計ジャッジ時間 11,213 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge12
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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 23 ms
21,768 KB
testcase_01 AC 21 ms
22,704 KB
testcase_02 AC 22 ms
21,940 KB
testcase_03 AC 27 ms
22,216 KB
testcase_04 AC 29 ms
21,916 KB
testcase_05 AC 44 ms
21,760 KB
testcase_06 AC 48 ms
21,768 KB
testcase_07 AC 68 ms
22,612 KB
testcase_08 AC 46 ms
21,940 KB
testcase_09 AC 68 ms
21,768 KB
testcase_10 AC 21 ms
22,228 KB
testcase_11 AC 22 ms
22,632 KB
testcase_12 AC 32 ms
21,992 KB
testcase_13 AC 32 ms
21,792 KB
testcase_14 AC 42 ms
21,780 KB
testcase_15 AC 28 ms
21,928 KB
testcase_16 AC 34 ms
21,940 KB
testcase_17 AC 19 ms
21,892 KB
testcase_18 AC 38 ms
22,588 KB
testcase_19 AC 42 ms
21,904 KB
testcase_20 AC 24 ms
22,016 KB
testcase_21 AC 24 ms
21,588 KB
testcase_22 AC 20 ms
21,904 KB
testcase_23 AC 20 ms
21,892 KB
testcase_24 AC 27 ms
21,940 KB
testcase_25 AC 47 ms
22,576 KB
testcase_26 AC 82 ms
21,892 KB
testcase_27 AC 27 ms
21,904 KB
testcase_28 AC 78 ms
22,636 KB
testcase_29 AC 22 ms
21,952 KB
testcase_30 AC 23 ms
21,868 KB
testcase_31 AC 27 ms
21,916 KB
testcase_32 AC 34 ms
21,916 KB
testcase_33 AC 36 ms
22,444 KB
testcase_34 AC 24 ms
21,792 KB
testcase_35 AC 34 ms
22,600 KB
testcase_36 AC 26 ms
22,856 KB
testcase_37 AC 31 ms
21,780 KB
testcase_38 AC 69 ms
21,892 KB
testcase_39 AC 22 ms
21,780 KB
testcase_40 AC 21 ms
22,564 KB
testcase_41 AC 21 ms
22,252 KB
testcase_42 AC 24 ms
22,576 KB
testcase_43 AC 35 ms
21,892 KB
testcase_44 AC 22 ms
21,916 KB
testcase_45 AC 28 ms
21,904 KB
testcase_46 AC 34 ms
21,904 KB
testcase_47 AC 28 ms
21,784 KB
testcase_48 AC 79 ms
22,576 KB
testcase_49 AC 77 ms
21,760 KB
testcase_50 AC 25 ms
21,892 KB
testcase_51 AC 29 ms
21,780 KB
testcase_52 AC 22 ms
22,564 KB
testcase_53 AC 43 ms
21,928 KB
testcase_54 AC 42 ms
21,892 KB
testcase_55 AC 25 ms
21,904 KB
testcase_56 AC 33 ms
21,904 KB
testcase_57 AC 69 ms
21,880 KB
testcase_58 AC 76 ms
21,952 KB
testcase_59 AC 28 ms
22,612 KB
testcase_60 AC 23 ms
22,528 KB
testcase_61 AC 26 ms
21,880 KB
testcase_62 AC 28 ms
21,780 KB
testcase_63 AC 25 ms
21,940 KB
testcase_64 AC 33 ms
21,928 KB
testcase_65 AC 28 ms
22,868 KB
testcase_66 AC 24 ms
22,252 KB
testcase_67 AC 27 ms
22,444 KB
testcase_68 AC 31 ms
21,992 KB
testcase_69 AC 58 ms
21,880 KB
testcase_70 AC 23 ms
21,904 KB
testcase_71 AC 25 ms
21,916 KB
testcase_72 AC 33 ms
21,952 KB
testcase_73 AC 39 ms
21,780 KB
testcase_74 AC 39 ms
21,964 KB
testcase_75 AC 74 ms
21,792 KB
testcase_76 AC 66 ms
22,264 KB
testcase_77 AC 91 ms
22,444 KB
testcase_78 AC 44 ms
22,564 KB
testcase_79 AC 74 ms
21,940 KB
testcase_80 AC 21 ms
21,928 KB
testcase_81 AC 30 ms
21,768 KB
testcase_82 AC 23 ms
21,940 KB
testcase_83 AC 19 ms
21,892 KB
testcase_84 AC 24 ms
21,904 KB
testcase_85 AC 29 ms
21,904 KB
testcase_86 AC 25 ms
22,252 KB
testcase_87 AC 28 ms
21,940 KB
testcase_88 AC 36 ms
22,276 KB
testcase_89 AC 82 ms
21,892 KB
testcase_90 AC 24 ms
21,904 KB
testcase_91 AC 22 ms
22,216 KB
testcase_92 AC 31 ms
22,576 KB
testcase_93 AC 26 ms
22,576 KB
testcase_94 AC 53 ms
21,904 KB
testcase_95 AC 61 ms
22,276 KB
testcase_96 AC 22 ms
21,792 KB
testcase_97 AC 79 ms
21,940 KB
testcase_98 AC 71 ms
21,780 KB
testcase_99 AC 76 ms
21,892 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#pragma GCC optimize("O3")
#include <bits/stdc++.h>

// clang-format off
using namespace std;
using ll = long long int;

#define all(v) (v).begin(),(v).end()
#define repeat(cnt,l) for(typename remove_const<typename remove_reference<decltype(l)>::type>::type cnt={};(cnt)<(l);++(cnt))
#define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt))
#define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt))
#define upto(cnt,b,e,step) for(auto cnt=(b);(cnt)<=(e);(cnt)+=(step))
#define downto(cnt,b,e,step) for(auto cnt=(b);(e)<=(cnt);(cnt)-=(step))
const long long MD = 998244353; const long double PI = 3.1415926535897932384626433832795L;
template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')'; return o; }
template<typename T> inline T& chmax(T& to, const T& val) { return to = max(to, val); }
template<typename T> inline T& chmin(T& to, const T& val) { return to = min(to, val); }
void bye(string s, int code = 0) { cout << s << endl; exit(code); }
mt19937_64 randdev(8901016);
template<typename T, typename Random = decltype(randdev), typename enable_if<is_integral<T>::value>::type* = nullptr>
inline T rand(T l, T h, Random& rand = randdev) { return uniform_int_distribution<T>(l, h)(rand); }
template<typename T, typename Random = decltype(randdev), typename enable_if<is_floating_point<T>::value>::type* = nullptr>
inline T rand(T l, T h, Random& rand = randdev) { return uniform_real_distribution<T>(l, h)(rand); }template<typename T>
static ostream& operator<<(ostream& o, const std::vector<T>& v) {
  o << "[ "; for(const auto& e : v) o<<e<<' '; return o << ']';
}

template <typename I> struct MyRangeFormat{ I b,e; MyRangeFormat(I _b, I _e):b(_b),e(_e){} };
template<typename I> static ostream& operator<<(ostream& o, const MyRangeFormat<I>& f) {
  o << "[ "; iterate(i,f.b,f.e) o<<*i<<' '; return o << ']';
}
template <typename I> struct MyMatrixFormat{
  const I& p; long long n, m;
  MyMatrixFormat(const I& _p, long long _n, long long _m):p(_p),n(_n),m(_m){}
};
template<typename I> static ostream& operator<<(ostream& o, const MyMatrixFormat<I>& f) {
  o<<'\n'; repeat(i,(f.n)) { repeat(j,f.m) o<<f.p[i][j]<<' '; o<<'\n'; }
  return o;
}
struct LOG_t { ~LOG_t() { cout << endl; } };
#define LOG (LOG_t(),cout<<'L'<<__LINE__<<": ")
#define FMTA(m,w) (MyRangeFormat<decltype(m+0)>(m,m+w))
#define FMTR(b,e) (MyRangeFormat<decltype(e)>(b,e))
#define FMTV(v) FMTR(v.begin(),v.end())
#define FMTM(m,h,w) (MyMatrixFormat<decltype(m+0)>(m,h,w))

#if defined(_WIN32) || defined(_WIN64)
#define getc_x _getc_nolock
#define putc_x _putc_nolock
#elif defined(__GNUC__)
#define getc_x getc_unlocked
#define putc_x putc_unlocked
#else
#define getc_x getc
#define putc_x putc
#endif
class MaiScanner {
  FILE* fp_;
  constexpr bool isvisiblechar(char c) noexcept { return (0x21<=(c)&&(c)<=0x7E); }
public:
  inline MaiScanner(FILE* fp):fp_(fp){}
  template<typename T> void input_integer(T& var) noexcept {
    var = 0; T sign = 1;
    int cc = getc_x(fp_);
    for (; cc < '0' || '9' < cc; cc = getc_x(fp_))
      if (cc == '-') sign = -1;
    for (; '0' <= cc && cc <= '9'; cc = getc_x(fp_))
      var = (var << 3) + (var << 1) + cc - '0';
    var = var * sign;
  }
  inline int c() noexcept { return getc_x(fp_); }
  template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr>
  inline MaiScanner& operator>>(T& var) noexcept { input_integer<T>(var); return *this; }
  inline MaiScanner& operator>>(string& var) {
    int cc = getc_x(fp_);
    for (; !isvisiblechar(cc); cc = getc_x(fp_));
    for (; isvisiblechar(cc); cc = getc_x(fp_))
      var.push_back(cc);
    return *this;
  }
  template<typename IT> inline void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; }
};
class MaiPrinter {
  FILE* fp_;
public:
  inline MaiPrinter(FILE* fp):fp_(fp){}
  template<typename T>
  void output_integer(T var) noexcept {
    if (var == 0) { putc_x('0', fp_); return; }
    if (var < 0)
      putc_x('-', fp_),
      var = -var;
    char stack[32]; int stack_p = 0;
    while (var)
      stack[stack_p++] = '0' + (var % 10),
      var /= 10;
    while (stack_p)
      putc_x(stack[--stack_p], fp_);
  }
  inline MaiPrinter& operator<<(char c) noexcept { putc_x(c, fp_); return *this; }
  template<typename T, typename enable_if<is_integral<T>::value, nullptr_t>::type = nullptr>
  inline MaiPrinter& operator<<(T var) noexcept { output_integer<T>(var); return *this; }
  inline MaiPrinter& operator<<(const char* str_p) noexcept { while (*str_p) putc_x(*(str_p++), fp_); return *this; }
  inline MaiPrinter& operator<<(const string& str) {
    const char* p = str.c_str();
    const char* l = p + str.size();
    while (p < l) putc_x(*p++, fp_);
    return *this;
  }
  template<typename IT> void join(IT begin, IT end, char sep = ' ') { for (bool b = 0; begin != end; ++begin, b = 1) b ? *this << sep << *begin : *this << *begin; }
};
MaiScanner scanner(stdin);
MaiPrinter printer(stdout);
// clang-format on

struct P {
  using T = int;
  T y, x;

  inline explicit P(T _y, T _x) : y(_y), x(_x) {}
  inline P() : y(0), x(0) {}

  inline bool operator==(P p) const { return y == p.y && x == p.x; }
  inline bool operator<(P p) const { return y == p.y ? x < p.x : y < p.y; }
  inline P operator+(P p) const { return P(y + p.y, x + p.x); }
  inline P operator-(P p) const { return P(y - p.y, x - p.x); }
  inline P& operator+=(P p) {
    y += p.y;
    x += p.x;
    return *this;
  }
  inline P& operator-=(P p) {
    y -= p.y;
    x -= p.x;
    return *this;
  }
  inline P& operator*=(T m) {
    y *= m;
    x *= m;
    return *this;
  }
  inline T distM(P p) const { return abs(y - p.y) + abs(x - p.x); }
  inline T distC(P p) const { return max(abs(y - p.y), abs(x - p.x)); }
  template <typename ITR>
  ITR nearestM(ITR begin, ITR end) const {
    if (begin == end)
      return end;
    T best = distM(*begin);
    ITR besti = begin;
    for (ITR it = begin; ++it, it != end;) {
      T m = distM(*it);
      if (best < m) {
        best = m;
        besti = it;
      }
    }
    return besti;
  }
};
inline ostream& operator<<(ostream& os, P p) {
  os << '(' << p.y << ',' << p.x << ')';
  return os;
}

// URDL
const P FourMoving[] = {P(-1, 0), P(0, 1), P(1, 0), P(0, -1)};
const P FiveMoving[] = {P(-1, 0), P(0, 1), P(1, 0), P(0, -1), P(0, 0)};
const P EightMoving[] = {P(-1, 0),  P(0, 1),  P(1, 0),  P(0, -1),
                         P(-1, -1), P(-1, 1), P(1, -1), P(1, 1)};

inline P operator*(P::T m, P p) noexcept {
  return P(m * p.y, m * p.x);
}

template <typename T>
// using T = int;
struct F {
  int height, width;
  vector<T> data;

  explicit F(int h, int w) : height(h), width(w), data(h * w) {}
  F() : F(1, 1) {}

  inline T& operator()(int y, int x) { return data[x + y * width]; }
  inline T& operator()(P p) { return data[p.x + p.y * width]; }
  inline T operator()(int y, int x) const { return data[x + y * width]; }
  inline T operator()(P p) const { return data[p.x + p.y * width]; }

  inline bool safe(int y, int x) const { return 0 <= y && y < height && 0 <= x && x < width; }
  inline bool safe(P p) const { return 0 <= p.y && p.y < height && 0 <= p.x && p.x < width; }

  inline void fill(T e) { std::fill(data.begin(), data.end(), e); }
  inline void resize(int h, int w) {
    height = h;
    width = w;
    data.resize(h * w);
  }

  void print(ostream& os, int setw_arg = 4) {
    for (int y = 0; y < height; ++y) {
      for (int x = 0; x < width; ++x)
        os << setw(setw_arg) << operator()(y, x) << ' ';
      os << '\n';
    }
  }
};

//

#define USE_EMULATOR 0

constexpr int H = 20;
constexpr int W = 20;
int PH;  // ミスする確率*1000 TODO: 1e9でもおｋ？?

bool phTrue(int p) {
  return rand(0, 1000) < p;
}

//

// <s>perecentage</s>
// 壁の重み
F<int> field_wall_r(H, W);
F<int> field_wall_d(H, W);
// 通行不能な箇所が通行可能になることはないので、
// 過去に移動できたならば、以降絶対に壁にならない
F<int> field_nowall_r(H, W);
F<int> field_nowall_d(H, W);

int& getW(P p, int d, F<int>& fd, F<int>& fr){
  // assume: p + V[d] is not out of screen.
  // URDL
  if (d == 0) {
    return fd(p - P{-1, 0});
  } else if (d == 1) {
    return fr(p);
  } else if (d == 2) {
    return fd(p);
  } else { // if (d == 3) {
    return fr(p - P{0, -1});
  }
}

int& getWall(P p, int d){
  return getW(p, d, field_wall_d, field_wall_r);
}

int& getNoWall(P p, int d){
  return getW(p, d, field_nowall_d, field_nowall_r);
}

// bool existsWall(P p, int d) {
//   return phTrue(getWall(p, d));
// }

//

F<int> emulator_wall_r(H, W);
F<int> emulator_wall_d(H, W);
void initEmulator(){
  mt19937_64 mt(8901016);
  
  repeat(i, 150) {
    int y = uniform_int_distribution<int>(0, H-1)(mt);
    int x = uniform_int_distribution<int>(0, W-1)(mt);
    int d = uniform_int_distribution<int>(0, 1)(mt);
    if (d) emulator_wall_d(y, x) = 1;
    else emulator_wall_r(y, x) = 1;
  }
  // 
  emulator_wall_d(0,0) = 0;
  
  string out[H*2];
  repeat(i, H*2) out[i] = string(W*2, '.');
  repeat(y, H) {
    repeat(x, W) {
      out[y*2+1][x*2+1] = '#';
      if (emulator_wall_r(y, x))
        out[y*2][x*2+1] = '#';
      if (emulator_wall_d(y, x))
        out[y*2+1][x*2] = '#';
    }
  }
  repeat(i, H*2) LOG<<out[i];
}

int emulateAnswer(const vector<int>& commands) {
  assert(!commands.empty());
  for (auto c : commands) {
    printer << "URDL"[c];
  }
  cout << endl;
  
  P current = P{0, 0};
  repeat(i, int(commands.size())) {
    if (getW(current, commands[i], emulator_wall_d, emulator_wall_r)) {
      LOG << "cmd=" << i << " is wall";
      return i;
    }
    if (rand(0, 1000) < PH) {
      LOG << "cmd=" << i << " unfortune";
      return i;
    }
    current += FourMoving[commands[i]];
  }
  if (current == P{H-1, W-1}) {
    LOG << "complete!";
    return -1;
  }
  return commands.size();
}

//

vector<int> calcNewPath() {
  const int inf = MD;
  F<int> prev_dirs(H, W);
  F<int /*bool*/> visited(H, W);
  
  priority_queue<pair<int, P>> que;
  que.emplace(0, P{0, 0});
  visited.fill(inf);
  visited(0, 0) = 0;
  
  P goal = P{H-1, W-1};
  
  while (!que.empty()) {
    P p = que.top().second;
    int w = -que.top().first;
    que.pop();
    
    if (visited(p) < w) continue;
    
    repeat(vi, 4) {
      auto v = FourMoving[vi];
      auto p2 = p + v;
      if (!visited.safe(p2))
        continue;
      int w2 = w + getWall(p, vi);
      if (visited(p2) <= w2)
        continue;
      prev_dirs(p2) = vi;
      visited(p2) = w2;
      que.emplace(-w2, p2);
    }
  }
  
  
#if 1
  // REDO:
  if (visited(goal) == inf) return calcNewPath();
#else
  while (!visited(goal)) {
    goal.x -= 1;
    if (goal.x < 0) {
      goal.x = W-1;
      goal.y -= 1;
    }
  }
#endif
  
  vector<int> commands;
  P current = goal;
  while (!(current == P{0, 0})) {
    auto vi = prev_dirs(current);
    auto v = FourMoving[vi];
    current -= v;
    commands.push_back(vi);
  }
  reverse(all(commands));
  
  return commands;
}

void feedbackWall(int& wall) {
  
  // increment(pow) HIGH
  // wall = (((wall >> 20) | 1) << 21) | (wall & ((1 << 20) - 1));
  // chmin(wall, 1 << 26);
  chmax(wall, 0);
  wall += 10000;
}
void feedbackNoWall(int& wall) {
  // wall &= (1 << 20) -1; // RESET HIGH because it's never wall
  // wall += 1;
  wall = 1;
  
}

void feedback(const vector<int>& commands, int length) {
  P current = P{0, 0};
  repeat(i, length) {
    getNoWall(current, commands[i]) = true;
    feedbackNoWall(getWall(current, commands[i])); 
    current += FourMoving[commands[i]];
  }
  if (getNoWall(current, commands[length])) {
#if USE_EMULATOR
    LOG << current << "URDL"[commands[length]] << " stopeed but it never wall!";
#endif
  } else {
    int& w = getWall(current, commands[length]);
    feedbackWall(w);
#if USE_EMULATOR
    LOG << current << "URDL"[commands[length]] << " may be wall: potential=" << w;
#endif
  }
}

//

int answerCommands(const vector<int>& commands) {
  for (auto c : commands) {
    printer << "URDL"[c];
  }
  cout << endl;
  int available_length;
  scanner >> available_length;
  return available_length;
}

void init() {
  // field_wall_d.fill(10);
  // field_wall_r.fill(10);
  field_wall_d.fill(1);
  field_wall_r.fill(1);
}

bool solve() {
  auto commands = calcNewPath();
#if USE_EMULATOR
  int available_length = emulateAnswer(commands);
#else
  int available_length = answerCommands(commands);
#endif
  if (available_length < 0) return true;
  
  feedback(commands, available_length);
  return false;
}

int main() {
  int h, w;
  scanner >> h >> w >> PH;
  PH *= 10;

#if USE_EMULATOR
  initEmulator();
#endif
  
  init();
  repeat(turn, 1212) {
    if (solve()) {
      cerr << "turn=" << turn << endl;
      break;
    }
  }
  
  return 0;
}
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