Submission #1069905

#	Time	Username	Problem	Language	Result	Execution time	Memory
1069905		j_vdd16	Rarest Insects (IOI22_insects)	C++17	91.90 / 100	60 ms	596 KiB

insects

#include "insects.h"

#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

//#define int long long
#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;

typedef uint64_t u64;
typedef int64_t i64;

int min_cardinality(int N) {
    vb isDone(N);

    vi madeItBigger(N, 0);
    vb isRemoved(N);
    loop(i, N) {
        move_inside(i);

        int res = press_button();
        if (res > 1) {
            madeItBigger[i] = 1;
            move_outside(i);
            isRemoved[i] = true;
        }
    }

    int diffCount = 0;
    loop(i, N) {
        if (!isRemoved[i]) {
            diffCount++;
            isDone[i] = true;
        }
    }

    int prevRes = 1;
    loop(i, N) {
        if (isDone[i]) continue;

        move_inside(i);
        int res = press_button();
        if (res > prevRes) {
            madeItBigger[i] = max(madeItBigger[i], prevRes);
            prevRes = res;
        }
    }
    int maxCount = prevRes;
    loop(i, N) {
        if (isDone[i]) continue;

        move_outside(i);
    }

    int total = N;
    vi possible;
    for (int x = 1; x <= N; x++) {
        if (diffCount == 2 && x + maxCount != total) continue;
        if (diffCount == 1 && (x != maxCount || x != total)) continue;

        if ((diffCount - 1) * x + maxCount <= total && total <= (diffCount - 1) * maxCount + x) {
            possible.push_back(x);
        }
    }

    int extra = 1;
    int l = 0, r = possible.size() - 1;
    while (l < r) {
        //int m = (4 * l + r + 4) / 5;
        int m = (2 * l + r + 2) / 3;

        int lessThanM = diffCount * extra;
        isRemoved = vb(N);

        int prevPress = extra;
        loop(i, N) {
            if (isDone[i]) continue;

            if (madeItBigger[i] >= possible[m]) {
                isRemoved[i] = true;
            }
            else {
                move_inside(i);
                int res = press_button();
                if (res > prevPress) {
                    madeItBigger[i] = max(madeItBigger[i], prevPress);
                    prevPress = res;
                }

                if (res > possible[m]) {
                    madeItBigger[i] = max(madeItBigger[i], possible[m]);
                    move_outside(i);
                    isRemoved[i] = true;
                }
                else {
                    lessThanM++;
                }
            }
        }

        if (lessThanM == diffCount * possible[m]) {
            l = m;
            loop(i, N) {
                if (!isRemoved[i] && !isDone[i]) {
                    isDone[i] = true;
                }
            }

            extra = possible[m];
        }
        else {
            r = m - 1;

            loop(i, N) {
                if (!isRemoved[i] && !isDone[i]) {
                    move_outside(i);
                }
            }
        }
    }

    return possible[l];
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 66.9 / 75