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Submission #859249

# Submission time Handle Problem Language Result Execution time Memory
859249 2023-10-10T02:19:55 Z MasterDobby Rarest Insects (IOI22_insects) C++17
0 / 100
 4 ms 344 KB 
#include <bits/stdc++.h>
#include "insects.h"
#define all(a) a.begin(),a.end()
#define pii pair<int,int>

using namespace std;
using ll = long long;

bitset<2020> ch;

int min_cardinality(int n){
    int cnt=1;
    ch[0]=1;
    move_inside(0);
    for(int i=1;i<n;i++){
        move_inside(i);
        int num=press_button();
        if(num==1){
            ch[i]=1;
            cnt++;
        }
        else{
            move_outside(i);
        }
    }
    int ans=1;
    // for(int i=2;i<=n;i++){
    //     int cnt2=0;
    //     for(int j=0;j<n;j++){
    //         if(cnt2==cnt) break;
    //         if(ch[j]) continue;
    //         move_inside(j);
    //         int num=press_button();
    //         if(num==i){
    //             ch[j]=1;
    //             cnt2++;
    //         }
    //         else{
    //             move_outside(j);
    //         }
    //     }
    //     if(cnt2!=cnt) break;
    //     ans=i;
    // }
    int l=1,r=n;
    while(l<r){
        int mid=(l+r+1)/2;
        int cnt2=cnt;
        vector<int> nw;
        for(int j=0;j<n;j++){
            if(cnt2==mid*cnt) break;
            if(ch[j]) continue;
            nw.push_back(j);
            move_inside(j);
            int num=press_button();
            if(num<=mid){
                ch[j]=1;
                cnt2++;
            }
            else{
                move_outside(j);
            }
        }
        if(cnt2==mid*cnt) l=mid;
        else{
            r=mid-1;
            for(auto x:nw) move_outside(x),ch[x]=0;
        }
    }
    return l;
}

Compilation message

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:26:9: warning: unused variable 'ans' [-Wunused-variable]
   26 |     int ans=1;
      |         ^~~

Subtask #1
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 Incorrect 4 ms 344 KB Wrong answer.
7 Halted 0 ms 0 KB -

Subtask #2
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 Incorrect 4 ms 344 KB Wrong answer.
7 Halted 0 ms 0 KB -

Subtask #3
0 / 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 Incorrect 0 ms 344 KB Wrong answer.
7 Halted 0 ms 0 KB -