oj.uz

Submission #872307

# Submission time Handle Problem Language Result Execution time Memory
872307 2023-11-12T17:38:01 Z Lib Rarest Insects (IOI22_insects) C++17
53.16 / 100
 89 ms 1104 KB 
#include <bits/stdc++.h>
#include "insects.h"
//#include "stub.cpp"
using namespace std;
int l,r,mid;
vector <int> PrevIndexIn,PrevIndexOut,RemainingInsects;
int InMachine[2003];
int n;
int TypeCount=0;
int CurrentInMachine=0;
 
int PossibleMincount(int cnt){
	//Pushing insects inside the machine, keeping track of the ones being putted inside for this iteration of binary searching
	mt19937 seed(63222221001217544);
	shuffle(RemainingInsects.begin(),RemainingInsects.end(),seed);
	for(int i=0;i<RemainingInsects.size();i++){
		if(CurrentInMachine==cnt*TypeCount){
			PrevIndexOut.push_back(RemainingInsects[i]);
			continue;
		}
		move_inside(RemainingInsects[i]);
		InMachine[RemainingInsects[i]]=1;
		PrevIndexIn.push_back(RemainingInsects[i]);
		CurrentInMachine++;
		if(press_button()>cnt){
			PrevIndexIn.pop_back();
			PrevIndexOut.push_back(RemainingInsects[i]);
			InMachine[RemainingInsects[i]]=0;
			move_outside(RemainingInsects[i]);
			CurrentInMachine--;
		}
	}
	RemainingInsects.clear();
	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(!PrevIndexIn.empty()){
			InMachine[PrevIndexIn.back()]=0;
			move_outside(PrevIndexIn.back());
			PrevIndexOut.push_back(PrevIndexIn.back());
			PrevIndexIn.pop_back();
			CurrentInMachine--;
		}
		RemainingInsects=PrevIndexOut;
		PrevIndexOut.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
		RemainingInsects=PrevIndexOut;
		PrevIndexIn.clear();
		PrevIndexOut.clear();
		return 1;
	}
}
 
int min_cardinality(int N){
	//Remember to initialize as this is multitest
	for(int i=0;i<N;i++){
    InMachine[i]=0;
    }
    PrevIndexIn.clear();
    PrevIndexOut.clear();
    RemainingInsects.clear();
	n=N;
	l=1;
	//Phase 1: Determining the amount of different types of insects
	TypeCount=0;
	CurrentInMachine=0;
	for(int i=0;i<n;i++){
		move_inside(i);
		InMachine[i]=1;
		CurrentInMachine++;
		if(press_button()>1){
			move_outside(i);
			InMachine[i]=0;
			CurrentInMachine--;
		}else{
			TypeCount++;
		}
	}
	for(int i=0;i<n;i++){
			if(!InMachine[i]){
				RemainingInsects.push_back(i);
			}
		}
	r=(RemainingInsects.size()/TypeCount+1);
	int ans=1;
	//Phase 2: Binary search for the answer
	while(r-l>=1){
		mid=(l+r+1)/2;
		if(PossibleMincount(mid)){
			ans=max(ans,mid);
			l=mid;
			r=min(r,mid+(n-CurrentInMachine)/TypeCount);
		}else{
			r=mid-1;
		}
	}
	return ans;
}

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:53:1: warning: control reaches end of non-void function [-Wreturn-type]
   53 | }
      | ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 600 KB Output is correct
10 Correct 7 ms 440 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 5 ms 688 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 3 ms 600 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 2 ms 440 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 3 ms 600 KB Output is correct
10 Correct 7 ms 440 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 5 ms 688 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 3 ms 600 KB Output is correct
18 Correct 3 ms 600 KB Output is correct
19 Correct 2 ms 440 KB Output is correct
20 Correct 2 ms 344 KB Output is correct
21 Correct 2 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 8 ms 444 KB Output is correct
24 Correct 5 ms 344 KB Output is correct
25 Correct 11 ms 440 KB Output is correct
26 Correct 16 ms 708 KB Output is correct
27 Correct 38 ms 600 KB Output is correct
28 Correct 5 ms 600 KB Output is correct
29 Correct 41 ms 444 KB Output is correct
30 Correct 24 ms 604 KB Output is correct
31 Correct 10 ms 500 KB Output is correct
32 Correct 11 ms 700 KB Output is correct
33 Correct 14 ms 692 KB Output is correct
34 Correct 11 ms 600 KB Output is correct
35 Correct 11 ms 856 KB Output is correct
36 Correct 13 ms 700 KB Output is correct
37 Correct 15 ms 596 KB Output is correct
38 Correct 16 ms 1104 KB Output is correct
39 Correct 12 ms 600 KB Output is correct
40 Correct 7 ms 944 KB Output is correct
41 Correct 4 ms 600 KB Output is correct

Subtask #3
28.16 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 25 ms 600 KB Output is correct
8 Correct 8 ms 344 KB Output is correct
9 Correct 25 ms 444 KB Output is correct
10 Partially correct 36 ms 612 KB Output is partially correct
11 Partially correct 89 ms 700 KB Output is partially correct
12 Correct 11 ms 600 KB Output is correct
13 Partially correct 81 ms 952 KB Output is partially correct
14 Partially correct 51 ms 440 KB Output is partially correct
15 Correct 19 ms 848 KB Output is correct
16 Correct 23 ms 848 KB Output is correct
17 Correct 23 ms 612 KB Output is correct
18 Correct 26 ms 424 KB Output is correct
19 Correct 24 ms 672 KB Output is correct
20 Correct 24 ms 600 KB Output is correct
21 Partially correct 32 ms 592 KB Output is partially correct
22 Partially correct 32 ms 680 KB Output is partially correct
23 Partially correct 32 ms 444 KB Output is partially correct
24 Correct 22 ms 932 KB Output is correct
25 Correct 13 ms 672 KB Output is correct
26 Correct 8 ms 444 KB Output is correct
27 Correct 24 ms 436 KB Output is correct
28 Correct 17 ms 592 KB Output is correct
29 Correct 22 ms 688 KB Output is correct
30 Correct 26 ms 600 KB Output is correct
31 Partially correct 33 ms 600 KB Output is partially correct
32 Partially correct 34 ms 848 KB Output is partially correct
33 Partially correct 37 ms 856 KB Output is partially correct
34 Partially correct 34 ms 440 KB Output is partially correct
35 Correct 23 ms 692 KB Output is correct
36 Correct 22 ms 344 KB Output is correct
37 Partially correct 33 ms 456 KB Output is partially correct
38 Partially correct 30 ms 848 KB Output is partially correct
39 Correct 27 ms 452 KB Output is correct
40 Correct 26 ms 596 KB Output is correct
41 Correct 23 ms 452 KB Output is correct
42 Correct 20 ms 688 KB Output is correct
43 Partially correct 14 ms 856 KB Output is partially correct
44 Partially correct 74 ms 848 KB Output is partially correct
45 Correct 19 ms 696 KB Output is correct
46 Correct 13 ms 456 KB Output is correct
47 Correct 13 ms 952 KB Output is correct
48 Correct 14 ms 612 KB Output is correct