#include <bits/stdc++.h>
#include "insects.h"
//#include "stub.cpp"
using namespace std;
vector <int> PrevIndexIn,PrevIndexOut,RemainingInsects;
int InMachine[2003];
int n;
int TypeCount=0;
int CurrentInMachine=0;
int PossibleMincount(int cnt){
PrevIndexIn.clear();
PrevIndexOut.clear();
//Pushing insects inside the machine, keeping track of the ones being putted inside for this iteration of binary searching
for(int i=0;i<RemainingInsects.size();i++){
move_inside(RemainingInsects[i]);
InMachine[RemainingInsects[i]]=1;
PrevIndexIn.push_back(RemainingInsects[i]);
if(press_button()>cnt){
PrevIndexIn.pop_back();
PrevIndexOut.push_back(RemainingInsects[i]);
InMachine[RemainingInsects[i]]=0;
move_outside(i);
}
}
CurrentInMachine=0;
for(int i=0;i<RemainingInsects.size();i++){
CurrentInMachine+=InMachine[RemainingInsects[i]];
}
RemainingInsects.clear();
if(CurrentInMachine<(cnt-l)*TypeCount){
//There clearly exist a type of insect with cardinality less than cnt, so the answer is less than cnt. Removing insects from last iteration.
while(!PrevIndexIn.empty()){
InMachine[PrevIndexIn.back()]=0;
move_outside(PrevIndexIn.back());
PrevIndexIn.pop_back();
}
for(int i=0;i<n;i++){
if(!InMachine[i]){
RemainingInsects.push_back(i);
}
}
return 0;
}else if(CurrentInMachine==cnt*TypeCount){
//As every type of insects has at least cnt insects, the answer is at least cnt. Just return true
for(int i=0;i<n;i++){
if(!InMachine[i]){
RemainingInsects.push_back(i);
}
}
return 1;
}
}
int min_cardinality(int N){
//Remember to initialize as this is multitest
for(int i=0;i<N;i++){
InMachine[i]=0;
}
int l,r,mid;
n=N;
l=1;
//Phase 1: Determining the amount of different types of insects
for(int i=0;i<n;i++){
move_inside(i);
InMachine[i]=1;
PrevIndexIn.push_back(i);
if(press_button()>1){
move_outside(i);
InMachine[i]=0;
PrevIndexIn.pop_back();
PrevIndexOut.push_back(i);
}
}
for(int i=0;i<n;i++){
if(!InMachine[i]){
RemainingInsects.push_back(i);
}
}
TypeCount=PrevIndexIn.size();
r=(n/TypeCount);
//Phase 2: Binary search for the answer
while(r-l>1){
mid=(l+r)/2;
if(PossibleMincount(mid)){
l=mid;
}else{
r=mid-1;
}
}
if(PossibleMincount(r)){
return r;
}else{
return l;
}
}
Compilation message
insects.cpp: In function 'int PossibleMincount(int)':
insects.cpp:16:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
16 | for(int i=0;i<RemainingInsects.size();i++){
| ~^~~~~~~~~~~~~~~~~~~~~~~~
insects.cpp:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int i=0;i<RemainingInsects.size();i++){
| ~^~~~~~~~~~~~~~~~~~~~~~~~
insects.cpp:32:27: error: 'l' was not declared in this scope
32 | if(CurrentInMachine<(cnt-l)*TypeCount){
| ^
insects.cpp:31:24: warning: control reaches end of non-void function [-Wreturn-type]
31 | RemainingInsects.clear();
| ~~~~~~~~~~~~~~~~~~~~~~^~
