Submission #579143

#	Time	Username	Problem	Language	Result	Execution time	Memory
579143		Jarif_Rahman	Carnival (CEOI14_carnival)	C++17	100 / 100	51 ms	312 KiB

carnival

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

int ask(vector<int> s){
    cout << s.size() << " ";
    for(int x: s) cout << x << " ";
    cout << "\n";
    int x; cin >> x;
    return x;
}

int main(){
    setbuf(stdout, NULL);

    int n; cin >> n;
    int c = 0;

    vector<int> ans(n), s;

    for(int i = 1; i <= n; i++){
        s.pb(i);
        if(ask(s) != c){
            c++;
            ans[i-1] = c;
            continue;
        }
        s.pop_back();

        int a = 0, b = c-1;
        while(a < b){
            int md = (a+b)/2;
            vector<int> ss(s.begin(), s.begin()+md+1);
            ss.pb(i);
            if(ask(ss) == ss.size()) a = md+1;
            else b = md;
        }

        ans[i-1] = a+1;
    }

    cout << "0 ";
    for(int x: ans) cout << x << " ";
    cout << "\n";
}

Compilation message (stderr)

carnival.cpp: In function 'int main()':
carnival.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |             if(ask(ss) == ss.size()) a = md+1;
      |                ~~~~~~~~^~~~~~~~~~~~

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