Submission #550057

#	Time	Username	Problem	Language	Result	Execution time	Memory
550057		palilo	Cave (IOI13_cave)	C++17	0 / 100	334 ms	416 KiB

cave

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

void exploreCave(int n) {
    using namespace std;
    vector<int> s(n), d(n, -1), query(n), unknown(n);
    iota(unknown.begin(), unknown.end(), 0);
    auto solve = [&](int door_id) {
        const auto res_if_0 {tryCombination(query.data()) == door_id};
        // const auto lo {unknown.begin()}, hi{unknown.end()};
        int lo {}, hi {static_cast<int>(unknown.size()) - 1};
        while (lo != hi) {
            const auto mid {(lo + hi) >> 1};
            for (int i = lo; i < mid; ++i) {
                query[unknown[i]] = 1;
            }
            const auto res {tryCombination(query.data()) == door_id};
            for (int i = lo; i < mid; ++i) {
                query[unknown[i]] = 0;
            }
            res == res_if_0 ? lo = mid + 1 : hi = mid;
        }
        s[lo] = res_if_0;
        d[lo] = door_id;
    };
    for (int i = 0; i < n; ++i) {
        solve(i);
    }
    answer(s.data(), d.data());
}

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