oj.uz

Submission #940761

# Submission time Handle Problem Language Result Execution time Memory
940761 2024-03-07T15:18:54 Z Sundavar Monster Game (JOI21_monster) C++17
0 / 100
 60 ms 4696 KB 
#include "monster.h"
#include <bits/stdc++.h>
using namespace std;
mt19937 rng(11);

vector<vector<int> > m(1000, vector<int>(1000, -1));
bool ask(int a, int b){
  if(m[a][b] == -1){
    m[a][b] = Query(a,b);
    m[b][a] = 1 - m[a][b];
  }
  return m[a][b];
}

vector<int> solve2(vector<int> v){
  if(v.size() == 1) return v;
  vector<int> left, right;
  for(int i = 0; i < v.size(); i++)
    if(i < v.size()/2) left.push_back(v[i]);
    else right.push_back(v[i]);
  left = solve2(left), right = solve2(right);
  vector<int> res;
  /*for(int& a : left) cout << a << " ";
  cout << "\n";
  for(int& a : right) cout << a << " ";
  cout << "\n";
  cout << "\n";*/
  for(int l = 0, r = 0; l < left.size() || r < right.size();){
    if(r == right.size() || (l < left.size() && ask(right[r], left[l]))) res.push_back(left[l++]);
    else res.push_back(right[r++]);
  }
  return res;
}

void correct_long(vector<int>& v, int i){
  int l = 1;
  while(i+l+1 < v.size() && ask(v[i], v[i+l+1])) l++;
  for(int j = 0; j < (l+1)/2; j++) swap(v[i+j], v[i+l-j]);
}

void correct_v(vector<int>& v, int i){
  int l = 1;
  while(i+l < v.size() && !ask(v[i-1], v[i+l])) l++;
  for(int j = 0; j < (l+1)/2; j++) swap(v[i+j], v[i+l-j]);
}

std::vector<int> Solve(int N) {
  vector<int> v;
  for(int i = 0; i < N ; i++) v.push_back(i);
  shuffle(v.begin(), v.end(), rng);
  v = solve2(v);
  /*for(int& a : v) cout<<a<<" ";
  cout << "\n";*/
  
  int cnt = 0, j = 0;
  for(int i = 1; i < 5; i++){
    cnt += ask(v[0], v[i]);
    if(cnt > 1) break;
  }
  if(cnt != 1){
    correct_long(v, 0);
  }
  if(cnt == 1 && !ask(v[0], v[1])){
    int cnt2 = 0;
    for(int i = 0; i < 5; i++) if(i != 1){
      cnt2 += ask(v[1], v[i]);
      if(cnt2 > 1) break;
    }
    if(cnt2 == 1) swap(v[0], v[1]);
  }
  for(int i = 0; i < N-1; i++){
    if(!ask(v[i], v[i+1])){ 
      correct_v(v, i+1);
      /*for(int& a : v) cout<<a<<" ";
      cout << "\n";*/
    }
  }
  /*for(int& a : v) cout<<a<<" ";
  cout << "\n";*/
  vector<int> T(N);
  for(int i = 0; i < N; i++) T[v[i]] = i;
  return T;
}

Compilation message

monster.cpp: In function 'std::vector<int> solve2(std::vector<int>)':
monster.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for(int i = 0; i < v.size(); i++)
      |                  ~~^~~~~~~~~~
monster.cpp:19:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     if(i < v.size()/2) left.push_back(v[i]);
      |        ~~^~~~~~~~~~~~
monster.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   for(int l = 0, r = 0; l < left.size() || r < right.size();){
      |                         ~~^~~~~~~~~~~~~
monster.cpp:28:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   for(int l = 0, r = 0; l < left.size() || r < right.size();){
      |                                            ~~^~~~~~~~~~~~~~
monster.cpp:29:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     if(r == right.size() || (l < left.size() && ask(right[r], left[l]))) res.push_back(left[l++]);
      |        ~~^~~~~~~~~~~~~~~
monster.cpp:29:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     if(r == right.size() || (l < left.size() && ask(right[r], left[l]))) res.push_back(left[l++]);
      |                              ~~^~~~~~~~~~~~~
monster.cpp: In function 'void correct_long(std::vector<int>&, int)':
monster.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |   while(i+l+1 < v.size() && ask(v[i], v[i+l+1])) l++;
      |         ~~~~~~^~~~~~~~~~
monster.cpp: In function 'void correct_v(std::vector<int>&, int)':
monster.cpp:43:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   while(i+l < v.size() && !ask(v[i-1], v[i+l])) l++;
      |         ~~~~^~~~~~~~~~
monster.cpp: In function 'std::vector<int> Solve(int)':
monster.cpp:55:16: warning: unused variable 'j' [-Wunused-variable]
   55 |   int cnt = 0, j = 0;
      |                ^

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4184 KB Output is correct
2 Incorrect 2 ms 4184 KB Wrong Answer [5]
3 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4184 KB Output is correct
2 Incorrect 2 ms 4184 KB Wrong Answer [5]
3 Halted 0 ms 0 KB -

Subtask #3
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 4668 KB Output is correct
2 Correct 60 ms 4656 KB Output is correct
3 Correct 48 ms 4664 KB Output is correct
4 Correct 43 ms 4656 KB Output is correct
5 Correct 46 ms 4440 KB Output is correct
6 Correct 36 ms 4440 KB Output is correct
7 Correct 36 ms 4396 KB Output is correct
8 Correct 49 ms 4444 KB Output is correct
9 Correct 38 ms 4692 KB Output is correct
10 Correct 58 ms 4664 KB Output is correct
11 Correct 51 ms 4692 KB Output is correct
12 Correct 46 ms 4696 KB Output is correct
13 Correct 34 ms 4696 KB Output is correct
14 Incorrect 45 ms 4432 KB Wrong Answer [5]
15 Halted 0 ms 0 KB -