Submission #1150724

#	Time	Username	Problem	Language	Result	Execution time	Memory
1150724		somefolk	medians (balkan11_medians)	C++20	5 / 100	1095 ms	2244 KiB

medians

#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <unordered_set>
#include <complex>
#include <list>
#include <cassert>
#include <chrono>
#include <random>
#include <stack>
#include <iomanip>
#include <fstream>
using namespace std;

#define endl "\n"
// #define int long long

const int INF = 2 * 1e5 + 5;
const int MOD = 1e9 + 7;

int mn(int m, vector<int> &visited){
    for(int i = 1; i <= m; i++){
        if(!visited[i]){
            return i;
        }
    }
    return m+1;
}

int mx(int m, vector<int> &visited){
    for(int i = m; i >= 1; i--){
        if(!visited[i]){
            return i;
        }
    }
    return 0;
}

void solve(){
    int n;
    cin >> n;
    vector<int> b(n);
    for(int i = 0; i < n; i++){
        cin >> b[i];
    }

    int m = 2*n-1;
    vector<int> sol, visited(m+1, 0);
    sol.push_back(b[0]);
    visited[b[0]] = 1;

    int l = mn(m, visited), r = mx(m, visited);
    for(int i = 1; i < n; i++){
        if(b[i] == b[i-1]){
            sol.push_back(l);
            sol.push_back(r);
            visited[l] = 1;
            visited[r] = 1;
            l = mn(m, visited);
            r = mx(m, visited);
        } else if(b[i] > b[i-1]){
            if(visited[b[i]]){
                r = mx(m, visited);
                visited[r] = 1;
                sol.push_back(r);
                r = mx(m, visited);
                visited[r] = 1;
                sol.push_back(r);
            } else {
                sol.push_back(b[i]);
                sol.push_back(r);
                visited[b[i]] = 1;
                visited[r] = 1;
                r = mx(m, visited);
            }
        } else {
            if(visited[b[i]]){
                l = mn(m, visited);
                visited[l] = 1;
                sol.push_back(l);
                l = mn(m, visited);
                visited[l] = 1;
                sol.push_back(l);
            } else {
                sol.push_back(b[i]);
                sol.push_back(l);
                visited[b[i]] = 1;
                visited[l] = 1;
                l = mn(m, visited);
            }
        }
    }

    for(auto &i : sol){
        cout << i << " ";
    }
    cout << endl;
}

int32_t main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int t = 1;
    // cin >> t;
    while(t--) solve();
    return 0;
}

• Subtask 1: 5 / 65
• Subtask 2: 0 / 35