Submission #652836

#TimeUsernameProblemLanguageResultExecution timeMemory
652836Lobo드문 곤충 (IOI22_insects)C++17
47.50 / 100
241 ms492 KiB
#include "insects.h"
#include<bits/stdc++.h>
using namespace std;

const int maxn = 2020;
int n, in[maxn], qtd[maxn];
int min_cardinality(int N) {
    int n = N;
    int diff = 1;
    int cnt = 0;
    // First count the number of different numbers
    move_inside(0); in[0] = 1; cnt++;
    qtd[0] = 1;
    for(int i = 1; i < n; i++) {
        move_inside(i); in[i] = 1; cnt++;
        qtd[i] = 1;
        diff++;
        int qry = press_button();
        if(qry == 2) {
            diff--;
            move_outside(i); in[i] = 0; cnt--;
            qtd[i] = 2;
        }
    }
    int cur = 1;
    int l = 1;
    int r = n;
    int ans = -1;
    while(l <= r) {
        int mid = (l+r)/2; // I want to see if the answer is <= mid

        for(int i = 0; i < n; i++) {
            if(in[i]) continue;
            move_inside(i); in[i] = 1; cnt++;
            int qry = press_button();
            if(qry > cur) {
                qtd[i] = qry;
            }
            cur = qry;
            if(cur > mid) {
                move_outside(i); in[i] = 0; cnt--;
                cur--;
            }
        }


        if(mid*diff == cnt) {
            ans = mid;
            l = mid+1;
        }
        else {
            r = mid-1;
        }

        for(int i = 0; i < n; i++) {
            if(in[i]) {
                move_outside(i); in[i] = 0; cnt--;
            }
        }
        cur = 0;
    }
    return ans;
}
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