Submission #1216817

#	Time	Username	Problem	Language	Result	Execution time	Memory
1216817		mariamp1	Cave (IOI13_cave)	C++20	0 / 100	279 ms	536 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;

void exploreCave(int N) {
    vector<int> S(N, 0), D(N, -1);
    vector<bool> ki(N, false);

    for (int door = 0; door < N; door++) {
        int result = tryCombination(S.data());
        int state;
        if (result == door || result == -1 || result > door)
            state = 0;
        else
            state = 1;

        int lo = 0, hi = N - 1, sw = -1;
        while (lo <= hi) {
            int mid = (lo + hi) / 2;
            vector<int> test = S;
            for (int i = 0; i <= mid; i++) {
                if (!ki[i])
                    test[i] = 1 - state;
            }
            for (int i = mid + 1; i < N; i++) {
                if (!ki[i])
                    test[i] = state;
            }

            int res = tryCombination(test.data());
            if (res == -1 || res > door) {
                sw = mid;
                hi = mid - 1;
            } else {
                lo = mid + 1;
            }
        }

        S[sw] = state;
        D[sw] = door;
        ki[sw] = true;
    }

    vector<int> finalD(N);
    for (int i = 0; i < N; i++) {
        finalD[D[i]] = i;
    }

    answer(S.data(), finalD.data());
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24