Submission #1103325

#	Time	Username	Problem	Language	Result	Execution time	Memory
1103325		raduv	Mouse (info1cup19_mouse)	C++17	83.23 / 100	324 ms	3408 KiB

mouse

#include <bits/stdc++.h>
//#define DEBUG
//#define PRINTQ
#ifndef DEBUG
#include "grader.h"
#endif // DEBUG
using namespace std;
 
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
 
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const int MAXN = 256;
ordered_set candidates[MAXN + 1];
ordered_set available, cavailable;
bool isset[MAXN + 1];
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
static inline long long genrand() {
  int x = abs(uniform_int_distribution<long long>(0, (long long)-1)(rng) * 3231311253412327863) % 1219083123232943211;
  return x;
}
#ifdef DEBUG
int p[MAXN + 1] = {43, 49, 22, 11, 29, 50, 26, 44, 4, 38, 48, 21, 7, 13, 24, 47, 41, 6, 9, 12, 25, 42, 18, 17, 1, 39, 27, 28, 46, 36, 14, 5, 3, 20, 31, 37, 30, 45, 16, 15 ,32, 35, 8, 10, 33, 34, 2, 19, 40, 23};
int n = 50;
int nq = 0;
int st1 = 1;
std::vector<int> ans;
#endif // DEBUG
#ifdef DEBUG
 
int isPermutation(std::vector<int> q){
  std::sort(q.begin(), q.end());
  int i = 1;
  for(auto x : q){
    if(x != i)
      return 0;
    i++;
  }
  return 1;
}
 
#endif // DEBUG
#ifdef DEBUG
int query(std::vector<int> q){
  #ifdef PRINTQ
  for(auto x : q)
    printf("%d ", x);
  printf(" perm : %d", isPermutation(q));
 
  printf("\n");
 
  #endif // PRINTQ
  nq++;
  st1 = std::min(st1, (int)isPermutation(q));
  int x = 0;
  for( int i = 0; i < n; i++ ){
    if(q[i] == p[i])
      x++;
  }
  return x;
}
#endif // DEBUG
void solve(int n){
  int i, j, x, p;
  for( i = 1; i <= n; i++ ){
    available.insert(i);
    for( j = 1; j <= n; j++ )
      candidates[i].insert(j);
  }
  std::vector<int> q(n);
  for( i = 1; i <= n; i++ ){
    int mn = n + 1;
    for( j = 1; j <= n; j++ )
      if( !isset[j] && candidates[j].size() < mn ){
        mn = candidates[j].size();
        p = j;
      }
    isset[p] = 1;
    while(candidates[p].size() > 1){
      q[p - 1] = *candidates[p].find_by_order(genrand() % candidates[p].size());
      cavailable = available;
      available.erase(q[p - 1]);
 
      for( j = 1; j <= n; j++ ){
        if(!isset[j]){
          q[j - 1] = *available.find_by_order(genrand() % available.size());
          available.erase(q[j - 1]);
        }
      }
 
      available = cavailable;
      #ifdef PRINTQ
      printf("%d available : ", p);
      for( auto x : available )
        printf("%d ", x);
      printf("\n");
      #endif // DEBUG
      if( (x = query(q)) == i - 1 ){
        for( j = 1; j <= n; j++ ){
          if( (!isset[j] || j == p) && candidates[j].find(q[j - 1]) != candidates[j].end())
            candidates[j].erase(q[j - 1]);
        }
      }
      else if(x == n)
        return;
    }
    q[p - 1] = *candidates[p].begin();
    for( j = 1; j <= n; j++ )
      if(!isset[j] && candidates[j].find(q[p - 1]) != candidates[j].end())
        candidates[j].erase(q[p - 1]);
    available.erase(*candidates[p].begin());
  }
  query(q);
}
#ifdef DEBUG
int main(){
  solve(n);
  int i = 0;
  int st = 1;
  for( auto x : ans ){
    if(x != p[i])
      st = 0;
    i++;
  }
  printf("Correct Permutations : %d\n", st1);
  printf("Good Last Permutation : %d\n", st);
  printf("Number Of Queries : %d\n", nq);
  return 0;
}
#endif // DEBUG

Compilation message (stderr)

mouse.cpp: In function 'void solve(int)':
mouse.cpp:75:45: warning: comparison of integer expressions of different signedness: '__gnu_pbds::detail::bin_search_tree_set<int, __gnu_pbds::null_type, std::less<int>, __gnu_pbds::detail::tree_traits<int, __gnu_pbds::null_type, std::less<int>, __gnu_pbds::tree_order_statistics_node_update, __gnu_pbds::rb_tree_tag, std::allocator<char> >, std::allocator<char> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   75 |       if( !isset[j] && candidates[j].size() < mn ){
      |                        ~~~~~~~~~~~~~~~~~~~~~^~~~

• Subtask 1: 13 / 13
• Subtask 2: 31.99999 / 38
• Subtask 3: 38.23078 / 49