Submission #632552

#	Time	Username	Problem	Language	Result	Execution time	Memory
632552		Filya	medians (balkan11_medians)	C++14	100 / 100	122 ms	15044 KiB

medians

/*/   
author:  ♥Filya♥
created: 20.08.2022
/*/
/////////////////////include/////////////////////
//#include <bits/stdc++.h>
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <cassert>
#include <set>
#include <map>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stdio.h>
#include <climits>
#include <numeric>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <typename T>
using ordered_set = tree <T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
/////////////////////define/////////////////////
#define ci(x) if(x) cout << "yes" << endl; else cout << "no" << endl;
#define cii(x) if(check(x))
#define MOD 1000000007
#define MOD2 998244353
#define oo 1e9
#define ool 1e18L
#define pii pair<int, int>
#define pll pair<long long, long long>
#define mii map<int, int>
#define vi vector<int>
#define vpi vector<pair<int, int>>
#define vll vector <ll>
#define ff first
#define ss second
#define mp make_pair
#define ll long long
#define ld long double
#define pb push_back
#define eb emplace_back
#define pob pop_back
#define lb lower_bound
#define ub upper_bound
#define bs binary_search
#define sz(x) (int((x).size()))
#define all(x) (x).begin(), (x).end()
#define alll(x) (x), (x) + n
#define clr(x) (x).clear();
#define fri(x) for(int i = 0; i < x; ++i)
#define frj(x) for(int j = 0; j < x; ++j)
#define frr(a, b) for(int i = a; i < b; ++i)
#define frrj(a, b) for(int j = a; j < b; ++j)
#define fra(x) for(int i = 0; i < x; ++i) cin >> a[i];
#define frb(x) for(int i = 0; i < x; ++i) cin >> b[i];
#define frs(x) for(auto it = x.begin(); it != x.end(); ++it)
#define fr(x) for(auto it : x) //el
#define fastio ios_base::sync_with_stdio(false); cin.tie(0);
#define dbg(x) cerr << #x << ": " << x << endl;
#define ce(x) cout << x << endl;
#define uniq(x) x.resize(unique(all(x)) - x.begin()); //make all one after sorting
#define blt __builtin_popcount
/////////////////////print array, vector, deque, set, multiset, pair, map /////////////////////
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]"; cout << endl;}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]"; cout << endl;}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]"; cout << endl;}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]"; cout << endl;}
template <class T> void print(stack <T> v) {cerr << "[ "; stack<T> s = v; while(s.size()) {int i = s.top(); print(i); s.pop(); cerr << " ";} cerr << "]"; cout << endl;}
template <class T> void print(queue <T> v) {cerr << "[ "; queue<T> s = v; while(s.size()) {int i = s.front(); print(i); s.pop(); cerr << " ";} cerr << "]"; cout << endl;}
template <class T> void print(deque <T> v) {cerr << "[ "; deque<T> s = v; while(s.size()) {int i = s.front(); print(i); s.pop_front(); cerr << " ";} cerr << "]"; cout << endl;}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]"; cout << endl;}
template <class T, class V> void print(unordered_map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]"; cout << endl;}
/////////////////////code/////////////////////
struct segtree {
    vector <ll> tree;
    int size = 1;
    void init(int n) { //make tree
        while(size < n) size *= 2;
        tree.assign(2 * size - 1, 0);
    }
    void set(int i, ll v, int x, int lx, int rx) {
        if(rx - lx == 1) {
            tree[x] = v;
            return;
        }
        int m = (lx + rx) / 2;
        if(i < m) set(i, v, 2 * x + 1, lx, m);
        else set(i, v, 2 * x + 2, m, rx);
        tree[x] = tree[2 * x + 1] + tree[2 * x + 2];
    }
    void set(int i, ll v) { //set i-th to v
        set(i, v, 0, 0, size);
    }
    long long sum(int l, int r, int x, int lx, int rx) {
        if(l >= rx || lx >= r) return 0;
        if(lx >= l && rx <= r) return tree[x];
        int m = (lx + rx) / 2;
        return sum(l, r, 2 * x + 1, lx, m) + sum(l, r, 2 * x + 2, m, rx);
    }
    long long sum(int l, int r) {
        return sum(l, r, 0, 0, size);
    }
};

void solve() {
    int n, a, big, small; 
    cin >> n;
    set<int> s;
    frr(1, 2 * n) s.insert(i);
    segtree st; st.init(2 * n);
    cin >> a;
    st.set(a, 1);
    s.erase(a);
    cout << a << ' ';
    frr(1, n - 1) {
        cin >> a;
        small = st.sum(0, a);
        big = st.sum(a + 1, 2 * n);
        // dbg(a) dbg(big) dbg(small)
        if(s.count(a)) {
            st.set(a, 1);
            s.erase(a);
            cout << a << ' ';
            if(big > small) {
                auto it = s.begin();
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
            }
            else {
                // print(s); dbg(i)
                auto it = prev(s.end());
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
            }
        }
        else {
            if(big > small) {
                auto it = s.begin();
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
                it = s.begin();
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
            }
            else if(small > big) {
                auto it = prev(s.end());
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
                it = prev(s.end());
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
            }
            else {
                auto it = prev(s.end());
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
                it = s.begin();
                st.set(*it, 1);
                cout << *it << ' ';
                s.erase(it);
            }
        }
    }
    cin >> a;
    for(int x : s)
        cout << x << ' ';
}
int main() {
    fastio;
    int t = 1;
    // cin >> t;
    while(t--) {
        solve();
    }
    return 0;
}

//	           ♥ ♥ ♥  ♥  ♥    ♥   ♥    ♥
//	           ♥      ♥  ♥     ♥ ♥    ♥ ♥
//	           ♥ ♥ ♥  ♥  ♥      ♥    ♥   ♥
//	           ♥      ♥  ♥      ♥   ♥ ♥ ♥ ♥
//	           ♥      ♥  ♥ ♥ ♥  ♥  ♥       ♥
//
//        God loves Fil, Fil accepts God's will

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