Submission #908698

#	Time	Username	Problem	Language	Result	Execution time	Memory
908698		vjudge1	Carnival (CEOI14_carnival)	C++17	100 / 100	9 ms	1208 KiB

carnival

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n;

//vector<int> HIDDEN = {1, 2, 1, 3, 2};

int ask(vector<int> guys) {
    cout << guys.size() << " ";
    for (auto i : guys) cout << i << " ";
    /**
    cout << endl;
    set<int> s;
    for (auto i : guys) s.insert(HIDDEN[i - 1]);
    return s.size();
    **/
    int res;
    cin >> res;
    return res;
}

int main() {
    cin >> n;
    vector<int> sol(n + 1);
    int cnt = 1;
    sol[1] = 1;
    vector<int> full;
    vector<int> pref;
    full.push_back(1);
    pref.push_back(1);
    for (int i = 2; i <= n; ++i) {
        int x = ask(full);
        full.push_back(i);
        if (ask(full) == x + 1) {
            sol[i] = ++cnt;
            pref.push_back(cnt);
            continue;
        }
        int l = 1, r = i - 1, ans = 0;
        while (l <= r) {
            int m = (l + r) / 2;
            vector<int> query;
            query.push_back(i);
            for (int j = 1; j <= m; ++j) {
                query.push_back(j);
            }
            if (ask(query) == pref[m - 1] + 1) {
                l = m + 1;
                ans = m;
            } else {
                r = m - 1;
            }
        }
        sol[i] = sol[ans + 1];
        pref.push_back(cnt);
    }
    cout << "0 ";
    for (int i = 1; i <= n; ++i) cout << sol[i] << " ";
    cout << endl;
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20