Submission #1132285

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132285		viwlesxq	Cave (IOI13_cave)	C++20	0 / 100	139 ms	568 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>

using namespace std;

void exploreCave(int n) {
    int s[n], d[n];

    vector<int> left;
    for (int i = 0; i < n; ++i)
        left.push_back(i);

    int i = 0;

    while (!left.empty()) {
        int c = 0;
        for (auto j : left)
            s[j] = 0;

        int t = tryCombination(s);
        if (t != -1 && t < i) c = 1;

        int lo = -1, hi = left.size() - 1;
        while (lo + 1 < hi) {
            int mid = (lo + hi) / 2;

            for (int j = 0; j <= mid; ++j)
                s[left[j]] = c;
            for (int j = mid + 1; j < left.size(); ++j)
                s[left[j]] = c ^ 1;

            t = tryCombination(s);

            if (t != -1 && t < i) lo = mid;
            else hi = mid;
        }

        d[left[hi]] = i++;
        s[left[hi]] = c;
        left.erase(left.begin() + hi);
    }

    answer(s, d);
}

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