Submission #815199

#	Time	Username	Problem	Language	Result	Execution time	Memory
815199		JakobZorz	Rarest Insects (IOI22_insects)	C++17	Compilation error	0 ms	0 KiB

insects

#include"insects.h"
#include<iostream>
#include<vector>
#include<set>
using namespace std;

set<int>inside;
int n,distinct;
int low_bound,high_bound;

int c_press_button(){
    return press_button();
}

void c_move_inside(int a){
    inside.insert(a);
    move_inside(a);
}

void c_move_outside(int a){
    inside.erase(a);
    move_outside(a);
}

void check(int c){
    for(int i=0;i<n;i++){
        c_move_inside(i);
        if(c_press_button()>c)
            c_move_outside(i);
    }
    
    bool res=inside.size()==c*distinct;
    
    if(res){
        low_bound=max(low_bound,c);
        high_bound=min(high_bound,c+(n-c*distinct)/distinct+1);
    }else{
        low_bound=max(low_bound,c-(c*distinct-inside.size()));
        high_bound=min(high_bound,c);
    }
    
    vector<int>inside_vec={inside.begin(),inside.end()};
    for(int i:inside_vec)
        c_move_outside(i);
}

int get_distinct(){
    for(int i=0;i<n;i++){
        c_move_inside(i);
        if(c_press_button()>1)
            c_move_outside(i);
    }
    
    int res=inside.size();
    
    vector<int>inside_vec={inside.begin(),inside.end()};
    for(int i:inside_vec)
        c_move_outside(i);
    
    return res;
}

int min_cardinality(int N){
    n=N;
    distinct=get_distinct();
    if(distinct>n/2)
        return 1;
    if(distinct==1)
        return n;
    low_bound=1;
    high_bound=n/distinct+1;
    
    while(low_bound<high_bound-1){
        int m=(low_bound+high_bound)/2;
        check(m);
    }
    return low_bound;
}

Compilation message (stderr)

insects.cpp: In function 'void check(int)':
insects.cpp:32:27: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |     bool res=inside.size()==c*distinct;
      |              ~~~~~~~~~~~~~^~~~~~~~~~~~
insects.cpp:38:61: error: no matching function for call to 'max(int&, std::set<int>::size_type)'
   38 |         low_bound=max(low_bound,c-(c*distinct-inside.size()));
      |                                                             ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/ostream:38,
                 from /usr/include/c++/10/iostream:39,
                 from insects.cpp:2:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
insects.cpp:38:61: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::set<int>::size_type' {aka 'long unsigned int'})
   38 |         low_bound=max(low_bound,c-(c*distinct-inside.size()));
      |                                                             ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/ostream:38,
                 from /usr/include/c++/10/iostream:39,
                 from insects.cpp:2:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
insects.cpp:38:61: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::set<int>::size_type' {aka 'long unsigned int'})
   38 |         low_bound=max(low_bound,c-(c*distinct-inside.size()));
      |                                                             ^