/*/
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);
fri(n - 1) {
cin >> a;
small = st.sum(0, a);
big = st.sum(a + 1, 2 * n);
if(s.count(a)) {
st.set(a, 1);
s.erase(a);
cout << a << ' ';
if(big > small) {
auto it = s.begin();
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
}
else {
// print(s); dbg(i)
auto it = prev(s.end());
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
}
}
else {
if(big > small) {
auto it = s.begin();
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
it = s.begin();
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
}
else if(small > big) {
auto it = prev(s.end());
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
it = prev(s.end());
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
}
else {
auto it = prev(s.end());
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
it = s.begin();
st.set(*it, 1);
s.erase(it);
cout << *it << ' ';
}
}
}
cin >> a;
auto it = s.begin();
cout << *it;
}
int main() {
fastio;
int t = 1;
// cin >> t;
while(t--) {
solve();
}
return 0;
}
// ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥
// ♥ ♥ ♥ ♥ ♥ ♥ ♥
// ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥
// ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥
// ♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥
//
// God loves Fil, Fil accepts God's will
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 5 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Incorrect |
1 ms |
324 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
320 KB |
Output isn't correct |
| 9 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 10 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
| 11 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 12 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 13 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
596 KB |
Output isn't correct |
| 2 |
Incorrect |
5 ms |
852 KB |
Output isn't correct |
| 3 |
Incorrect |
9 ms |
1364 KB |
Output isn't correct |
| 4 |
Incorrect |
22 ms |
2596 KB |
Output isn't correct |
| 5 |
Incorrect |
38 ms |
4804 KB |
Output isn't correct |
| 6 |
Incorrect |
77 ms |
9448 KB |
Output isn't correct |
| 7 |
Incorrect |
119 ms |
15732 KB |
Output isn't correct |
