Submission #1124216

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124216		epicci23	Rarest Insects (IOI22_insects)	C++17	Compilation error	0 ms	0 KiB

insects

#include "insects.h"
#include "bits/stdc++.h"
using namespace std;

const int N = 2e3 + 5;

int vis[N], D , tot = 0 , kill[N];

inline bool Add(int x){
  if(vis[x]) return 0;
  vis[x]=1;
  tot++;
  move_inside(x);
  return 1;
}

inline bool Rem(int x){
  if(!vis[x]) return 0;
  vis[x]=0;
  tot--;
  move_outside(x);
  return 1;
}

inline int Get(){
  return press_button();
}

int min_cardinality(int n){
  for(int i=0;i<n;i++){
    Add(i);
    if(i == 0 || Get() == 1) continue;
    Rem(i);
  }

  D = tot;
  if(D > n / 2) return 1;
  if(D == 1) return n;

  int l = 2 , r = n / D , ans = 1;
  while(l <= r){
    int B = (l + r) / 2;
    vector<int> to_kill;
    for(int i = 0 ; i < n ; i++){
      if(vis[i] || kill[i]) continue;
      Add(i);
      if(tot > B && Get() > B){
       Rem(i);
       to_kill.push_back(i);
      }
    }
    if(tot == B * D){
      ans = B;  
      l = B + 1;
    }
    else{
      for(int x : to_kill) kill[x] = 1;
      r = tot / D;
    }
  }

  return ans;
}

Compilation message (stderr)

insects.cpp:7:33: error: 'int kill [2005]' redeclared as different kind of entity
    7 | int vis[N], D , tot = 0 , kill[N];
      |                                 ^
In file included from /usr/include/c++/11/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:43,
                 from insects.cpp:2:
/usr/include/signal.h:112:12: note: previous declaration 'int kill(__pid_t, int)'
  112 | extern int kill (__pid_t __pid, int __sig) __THROW;
      |            ^~~~
insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:45:26: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   45 |       if(vis[i] || kill[i]) continue;
      |                          ^
insects.cpp:57:34: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   57 |       for(int x : to_kill) kill[x] = 1;
      |                                  ^
insects.cpp:57:36: error: assignment of read-only location '*(kill + ((sizetype)x))'
   57 |       for(int x : to_kill) kill[x] = 1;
      |                            ~~~~~~~~^~~