제출 #836519

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
836519		SamAnd	Rarest Insects (IOI22_insects)	C++17	88.64 / 100	70 ms	488 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
typedef long long ll;
mt19937 rnf(2106);
const int N = 2003;

vector<int> q[N];
int min_cardinality(int N)
{
    vector<int> v;
    vector<int> b;
    for (int i = 0; i < N; ++i)
    {
        move_inside(i);
        if (press_button() == 1)
        {
            v.push_back(i);
        }
        else
        {
            move_outside(i);
            b.push_back(i);
        }
    }
    for (int i = 0; i < sz(v); ++i)
        move_outside(v[i]);

    //if (sz(v) > 100)
    {
        int ans = 1;
        while (!b.empty())
        {
            for (int i = sz(b) - 1; i >= 0; --i)
                swap(b[i], b[rnf() % (i + 1)]);
            vector<int> vv;
            vector<int> bb;
            for (int i = 0; i < sz(b); ++i)
            {
                if (sz(v) == sz(vv))
                {
                    bb.push_back(b[i]);
                    continue;
                }
                move_inside(b[i]);
                if (press_button() == 1)
                {
                    vv.push_back(b[i]);
                }
                else
                {
                    move_outside(b[i]);
                    bb.push_back(b[i]);
                }
            }
            if (sz(vv) < sz(v))
                break;
            ++ans;
            for (int i = 0; i < sz(vv); ++i)
                move_outside(vv[i]);
            b = bb;
        }
        return ans;
    }

    vector<int> l, r, u;
    l.assign(sz(b), 0);
    r.assign(sz(b), sz(v) - 1);
    u.assign(sz(b), -1);
    while (1)
    {
        for (int i = 0; i < sz(v); ++i)
            q[i].clear();
        bool z = false;
        for (int i = 0; i < sz(b); ++i)
        {
            if (l[i] <= r[i])
            {
                int m = (l[i] + r[i]) / 2;
                q[m].push_back(i);
                z = true;
            }
        }
        if (!z)
            break;
        for (int i = 0; i < sz(v); ++i)
        {
            move_inside(v[i]);
            for (int j = 0; j < sz(q[i]); ++j)
            {
                move_inside(b[q[i][j]]);
                if (press_button() == 2)
                {
                    u[q[i][j]] = i;
                    r[q[i][j]] = i - 1;
                }
                else
                    l[q[i][j]] = i + 1;
                move_outside(b[q[i][j]]);
            }
        }
        for (int i = 0; i < sz(v); ++i)
        {
            move_outside(v[i]);
        }
    }

    vector<int> q;
    q.assign(sz(v), 1);
    for (int i = 0; i < sz(b); ++i)
        ++q[u[i]];
    int ans = q[0];
    for (int i = 0; i < sz(v); ++i)
        ans = min(ans, q[i]);
    return ans;
}

/*
10
1 1 2 2 1 2 3 3 3 4
*/

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 63.64 / 75