Submission #987220

#	Time	Username	Problem	Language	Result	Execution time	Memory
987220		VMaksimoski008	Carnival (CEOI14_carnival)	C++17	0 / 100	3 ms	344 KiB

carnival

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

int ask(vector<int> v) {
    cout << v.size() << " ";
    for(int &x : v) cout << x << " ";
    cout << endl;

    int x;
    cin >> x;
    return x;
}

int main() {
    int n;
    cin >> n;

    vector<int> ans(n+1), ok(n+1);
    ans[1] = ok[1] = 1;
    int cnt = 1;

    vector<int> v = { 1 }; 
    for(int i=2; i<=n; i++) {
        v.push_back(i);
        int X = ask(v);

        if(X == cnt + 1) {
            ans[i] = ++cnt;
            continue;
        }

        int l=0, r=v.size()-2;
        while(l <= r) {
            int mid = (l + r) / 2;
            vector<int> v2;
            for(int j=l; j<=mid; j++) v2.push_back(v[j]);
            if(ask(v2) == mid - l + 1) ans[i] = ans[v[mid]], r = mid - 1;
            else l = mid + 1;
        }

        v.pop_back();
    }

    for(int &x : ans) cout << x << " ";
    cout << endl;
    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20