oj.uz

Submission #894082

# Submission time Handle Problem Language Result Execution time Memory
894082 2023-12-28T00:41:28 Z MilosMilutinovic Monster Game (JOI21_monster) C++17
98 / 100
 58 ms 2508 KB 
#include "monster.h"
#include <bits/stdc++.h>

using namespace std;

namespace {

bool example_variable;

}  // namespace

vector<int> Solve(int n) {
  map<pair<int, int>, bool> mp;
  function<bool(int, int)> Ask = [&](int x, int y) {
    if (x > y) {
      return !Ask(y, x);
    }
    if (!mp.count({x, y})) {
      mp[{x, y}] = Query(x, y);
    }
    return mp[{x, y}];
  };
  vector<int> order(n);
  iota(order.begin(), order.end(), 0);
  vector<int> tmp(n);
  function<void(int, int)> MergeSort = [&](int l, int r) {
    if (l == r) {
      return;
    }
    int mid = l + r >> 1;
    MergeSort(l, mid);
    MergeSort(mid + 1, r);
    for (int i = l; i <= r; i++) {
      tmp[i] = order[i];
    }
    int pl = l, pr = mid + 1;
    int ptr = l;
    while (pl <= mid || pr <= r) {
      if (pl > mid) {
        order[ptr++] = tmp[pr++];
      } else if (pr > r) {
        order[ptr++] = tmp[pl++];
      } else {
        order[ptr++] = (Ask(tmp[pl], tmp[pr]) ? tmp[pl++] : tmp[pr++]);
      }
    }
  };
  MergeSort(0, n - 1);
  int pos = -1;
  auto Check = [&]() {
    if (Ask(order[0], order[2])) {
      return false;
    }
    if (!Ask(order[0], order[1])) {
      return false;
    }
    if (!Ask(order[1], order[2])) {
      return false;
    }
    return true;
  };
  if (n <= 10) {
    vector<int> bad;
    for (int i = 1; i < n; i++) {
      if (!Ask(order[0], order[i])) {
        bad.push_back(i);
      }
    }
    if ((int) bad.size() > 1) {
      pos = bad.rbegin()[1];
    } else {
      bool ok = true;
      for (int i = 2; i < n; i++) {
        if (!Ask(order[1], order[i])) {
          ok = false;
          break;
        }
      }
      if (ok) {
        pos = 1;
      } else {
        pos = 0;
      }
    }
  } else {
    if (Check()) {
      if (!Ask(order[0], order[3]) && !Ask(order[1], order[3])) {
        vector<int> bad;
        for (int i = 1; i < n; i++) {
          if (!Ask(order[0], order[i])) {
            bad.push_back(i);
          }
        }
        pos = bad.rbegin()[1];
      } else {
        int smx = -1;
        vector<int> cnt(3);
        auto Update = [&](int x) {
          for (int i = 0; i < 3; i++) {
            if (cnt[i] > 0) {
              return;
            }
          }
          for (int i = 0; i < 3; i++) {
            cnt[i] += !Ask(order[i], x);
          }
        };
        if (!Ask(order[3], order[5]) && Ask(order[3], order[4]) && Ask(order[4], order[5])) {
          if (!Ask(order[3], order[6]) && !Ask(order[4], order[6])) {
            vector<int> bad(order[6]);
            for (int i = 7; i < n; i++) {
              int x = 3;
              for (int j = 3; j <= i - 2; j++) {
                if (mp.count({order[j], order[i]})) {
                  x = j;
                }
              }
              if (!Ask(order[x], order[i])) {
                bad.push_back(order[i]);
              }
            }
            if ((int) bad.size() > 1) {
              bad.pop_back();
            }
            Update(bad.back());
          } else {
            for (int i = 3; i < 6; i++) {
              Update(order[i]);
            }
          }
        } else {
          Update(order[4]);
          Update(order[3]);
        }
        for (int i = 0; i < 3; i++) {
          if (cnt[i] > 0) {
            pos = (i - 1 + 3) % 3;
          }
        }
      }
    } else {
      bool ok = true;
      for (int i = 2; i < n; i++) {
        if (!Ask(order[1], order[i])) {
          ok = false;
          break;
        }
      }
      if (ok) {
        pos = 1;
      } else {
        pos = 0;
      }
    }
  }
  vector<int> res;
  function<void(int, int)> Solve = [&](int l, int r) {
    for (int i = r; i >= l; i--) {
      res.push_back(order[i]);
    }
    if (r == n - 1) {
      return;
    }
    for (int i = r + 1; i < n; i++) {
      int x = l;
      for (int j = l; j <= r; j++) {
        if (mp.count({order[j], order[i]})) {
          x = j;
          break;
        }
      }
      if (Ask(order[l], order[i]) == (l != l)) {
        Solve(r + 1, i);
        break;
      }
    }
  };
  Solve(0, pos);
  reverse(res.begin(), res.end());
  vector<int> ret(n);
  for (int i = 0; i < n; i++) {
    ret[res[i]] = i;
  }
  return ret;
}

Compilation message

monster.cpp: In lambda function:
monster.cpp:30:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |     int mid = l + r >> 1;
      |               ~~^~~
monster.cpp: In function 'std::vector<int> Solve(int)':
monster.cpp:96:13: warning: unused variable 'smx' [-Wunused-variable]
   96 |         int smx = -1;
      |             ^~~
monster.cpp: In lambda function:
monster.cpp:172:41: warning: self-comparison always evaluates to false [-Wtautological-compare]
  172 |       if (Ask(order[l], order[i]) == (l != l)) {
      |                                       ~ ^~ ~
monster.cpp:165:11: warning: variable 'x' set but not used [-Wunused-but-set-variable]
  165 |       int x = l;
      |           ^
monster.cpp: At global scope:
monster.cpp:8:6: warning: '{anonymous}::example_variable' defined but not used [-Wunused-variable]
    8 | bool example_variable;
      |      ^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 5 ms 856 KB Output is correct
17 Correct 6 ms 600 KB Output is correct
18 Correct 8 ms 600 KB Output is correct
19 Correct 6 ms 1112 KB Output is correct
20 Correct 6 ms 884 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 4 ms 1108 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 5 ms 884 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 5 ms 856 KB Output is correct
17 Correct 6 ms 600 KB Output is correct
18 Correct 8 ms 600 KB Output is correct
19 Correct 6 ms 1112 KB Output is correct
20 Correct 6 ms 884 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 4 ms 1108 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 344 KB Output is correct
31 Correct 0 ms 344 KB Output is correct
32 Correct 5 ms 884 KB Output is correct
33 Correct 47 ms 1708 KB Output is correct
34 Correct 42 ms 1644 KB Output is correct
35 Correct 43 ms 1720 KB Output is correct
36 Correct 42 ms 1400 KB Output is correct
37 Correct 50 ms 1636 KB Output is correct
38 Correct 49 ms 1544 KB Output is correct
39 Correct 48 ms 2036 KB Output is correct
40 Correct 48 ms 2484 KB Output is correct
41 Correct 45 ms 1128 KB Output is correct
42 Correct 44 ms 1164 KB Output is correct
43 Correct 28 ms 1196 KB Output is correct
44 Correct 28 ms 1896 KB Output is correct

Subtask #3
73.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 1388 KB Output is correct
2 Correct 45 ms 1388 KB Output is correct
3 Partially correct 49 ms 1796 KB Partially correct
4 Correct 58 ms 1536 KB Output is correct
5 Correct 51 ms 1224 KB Output is correct
6 Correct 41 ms 1736 KB Output is correct
7 Correct 35 ms 1696 KB Output is correct
8 Correct 46 ms 1828 KB Output is correct
9 Partially correct 57 ms 1612 KB Partially correct
10 Correct 54 ms 1936 KB Output is correct
11 Correct 52 ms 1992 KB Output is correct
12 Partially correct 50 ms 1592 KB Partially correct
13 Correct 44 ms 1764 KB Output is correct
14 Correct 46 ms 2508 KB Output is correct
15 Correct 25 ms 2152 KB Output is correct
16 Correct 41 ms 1616 KB Output is correct
17 Correct 31 ms 1372 KB Output is correct
18 Correct 47 ms 1540 KB Output is correct