제출 #1325487

#제출 시각아이디문제언어결과실행 시간메모리
1325487zwezdinvMonster Game (JOI21_monster)C++20
25 / 100
79 ms1920 KiB
#include <bits/stdc++.h>
#include "monster.h"

std::map<std::pair<int, int>, bool> ret;
bool ask(int x, int y) {
    if (ret.count({x, y})) return ret[{x, y}];
    if (ret.count({y, x})) return !ret[{y, x}];
    ret[{x, y}] = Query(x, y);
    return ret[{x, y}];
}

std::mt19937 rng(234234);
std::vector<int> Solve(int n) {
    ret.clear();
    std::vector<int> vec(n);
    std::iota(vec.begin(), vec.end(), 0);
    std::shuffle(vec.begin(), vec.end(), rng);
    std::sort(vec.begin(), vec.end(), [&](int x, int y) {
        return ask(y, x);
    });
    std::vector<std::pair<int, int>> ss;
    const int SZ = std::min(n, 8);
    for (int i = 0; i < SZ; ++i) {
        int cnt = 0;
        for (int j = 0; j < SZ; ++j) {
            if (i != j) cnt += ask(vec[i], vec[j]);
        }
        ss.emplace_back(cnt, vec[i]);
    }
    std::sort(ss.begin(), ss.end());
    int mn;
    if (ss[0].first == ss[1].first) {
        mn = ask(ss[0].second, ss[1].second) ? ss[0].second : ss[1].second;
    } else {
        mn = ss[0].second;
    }
    int i = 0, j = std::find(vec.begin(), vec.end(), mn) - vec.begin();
    if (j == SZ - 1) {
        while (j + 1 < n && ask(vec[1], vec[j + 1])) ++j;
    }
    std::reverse(vec.begin(), vec.begin() + j + 1);
    while (j != n - 1) {
        int k = j + 1;
        while (ask(vec[k], vec[j])) ++k;
        std::reverse(vec.begin() + j + 1, vec.begin() + k + 1);
        i = j + 1, j = k;
    }
    std::vector<int> ans(n);
    for (int i = 0; i < n; ++i) ans[vec[i]] = i;
    return ans;
}

// int main() {
//     int n = s.size();
//     for (auto x : Solve(n)) std::cout << x << ' ';
// }
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