#include <bits/stdc++.h>
#include "insects.h"
//#include "stub.cpp"
using namespace std;
deque <int> PrevIndex;
int InMachine[2003];
int Permutation[2003];
//saving the answer of each iteration so that we won't accidentially binsearch something we've already calculated
int ok[2003];
int n;
int TypeCount=0;
int CurrentInMachine=0;
int PossibleMincount(int cnt){
PrevIndex.clear();
if(ok[cnt]){
return 1;
}
//Pushing insects inside the machine, keeping track of the ones being putted inside for this iteration of binary searching
for(int i=0;i<n;i++){
if(!InMachine[Permutation[i]]){
InMachine[Permutation[i]]=1;
move_inside(Permutation[i]);
PrevIndex.push_back(Permutation[i]);
if(press_button()>cnt){
move_outside(Permutation[i]);
InMachine[Permutation[i]]=0;
PrevIndex.pop_back();
}
}
}
CurrentInMachine=0;
for(int i=0;i<n;i++){
CurrentInMachine+=InMachine[Permutation[i]];
}
if(CurrentInMachine!=cnt*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(!PrevIndex.empty()){
InMachine[PrevIndex.front()]=0;
move_outside(PrevIndex.front());
PrevIndex.pop_front();
}
PrevIndex.clear();
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
PrevIndex.clear();
for(int i=1;i<=cnt;i++){
ok[i]=1;
}
return 1;
}
}
int min_cardinality(int N){
//Create a random permutation to fuck with shitty tests and achieve better query efficiency
for(int i=0;i<N;i++){
Permutation[i]=i;
}
srand(time(NULL));
int Tempval;
for(int i=N-1;i>0;i--){
Tempval=rand()%i;
swap(Permutation[i],Permutation[Tempval]);
}
//Remember to initialize as this is multitest
for(int i=0;i<N;i++){
InMachine[Permutation[i]]=0;
ok[i+1]=0;
}
PrevIndex.clear();
int l,r,mid;
//Phase 1: Determining the amount of different types of insects
for(int i=0;i<n;i++){
move_inside(Permutation[i]);
InMachine[Permutation[i]]=1;
PrevIndex.push_back(Permutation[i]);
if(press_button()>1){
move_outside(Permutation[i]);
InMachine[Permutation[i]]=0;
PrevIndex.pop_back();
}
}
TypeCount=PrevIndex.size();
r=(n/TypeCount);
l=1;
//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:54:1: warning: control reaches end of non-void function [-Wreturn-type]
54 | }
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 8 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
344 KB |
Execution killed with signal 8 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
516 KB |
Execution killed with signal 8 |
| 2 |
Halted |
0 ms |
0 KB |
- |
