Submission #1101209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101209		raduv	Mouse (info1cup19_mouse)	C++17	0 / 100	1 ms	336 KiB

mouse

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <set>
#include <vector>
//#define DEBUG
//#define PRINTQ
#ifndef DEBUG
#include "grader.h"
#endif // DEBUG
const int MAXN = 256;
std::set<int> candidates[MAXN + 1];
std::set<int> available, cavailable;
#ifdef DEBUG
int p[MAXN + 1];
int n;
#endif // DEBUG
int order_of_key(std::set<int> st, int poz){
  auto it = st.begin();
  for( int i = 1; i <= poz; i++ )
    it++;
  return *it;
}
#ifdef DEBUG
int query(std::vector<int> q){
  #ifdef PRINTQ
  printf("%d ", q.size());
  for(auto x : q)
    printf("%d ", x);
  printf("\n");
  #endif // PRINTQ
  int x = 0;
  for( int i = 0; i < n; i++ ){
    if(q[i] == p[i])
      x++;
  }
  return x;
}
#endif // DEBUG
void solve(int n){
  srand(time(0));
  int i, j, x;
  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++ ){
    while(candidates[i].size() > 1){
      q[i - 1] = order_of_key(candidates[i], rand() % candidates[i].size());
      cavailable = available;
      available.erase(q[i - 1]);

      for( j = i + 1; j <= n; j++ ){
        q[j - 1] = order_of_key(available, rand() % available.size());
        available.erase(q[j - 1]);
      }

      available = cavailable;
      #ifdef DEBUG
      printf("available : ");
      for( auto x : available )
        printf("%d ", x);
      printf("\n");
      #endif // DEBUG
      if( (x = query(q)) == i - 1 ){
        for( j = i; j <= n; j++ ){
          if(candidates[j].find(q[j - 1]) != candidates[j].end())
            candidates[j].erase(q[j - 1]);
        }
      }
      else if(x == n)
        return;
      q[i - 1] = *candidates[i].begin();

      for( j = i + 1; j <= n; j++ )
        if(candidates[j].find(q[i - 1]) != candidates[j].end())
          candidates[j].erase(q[i - 1]);

    }
  }
  query(q);
}
#ifdef DEBUG
int main(){
  n = 7;
  p[0] = 2;
  p[1] = 1;
  p[2] = 3;
  p[3] = 4;
  solve(n);
  return 0;
}
#endif // DEBUG

• Subtask 1: 0 / 13
• Subtask 2: 0 / 38
• Subtask 3: 0 / 49