Submission #766495

#	Time	Username	Problem	Language	Result	Execution time	Memory
766495		nnhzzz	medians (balkan11_medians)	C++14	100 / 100	83 ms	12800 KiB

medians

// cre: Nguyen Ngoc Hung - Train VOI 2024 :>

#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <unordered_set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <cstring>
#include <unordered_map>
#include <cmath>
#include <cassert>
#include <random>

using namespace std;

#define uniquev(v) sort(all(v)),(v).resize(unique(all(v))-(v).begin())
#define __nnhzzz__ signed main()
#define reset(x,val) memset((x),(val),sizeof(x))
#define bit(i,j) ((i>>j)&1LL)
#define mask(i) (1LL<<i)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define sz(x) (int)(x).size()
#define fi first
#define se second
#define INF 0x3f3f3f3f
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int,int> pii; typedef pair<ll,ll> pll;
typedef vector<int> vi; typedef vector<vi> vvi; typedef vector<pii> vpii;
const int oo = 1e9+197;
const int maxn = 1e5+7,N = 1e2+3;
const int MOD = 1e9+7,MOD1 = 1e9+207,MOD2 = 1e9+407,MOD3 = 998244353;
template<typename T1, typename T2> bool mini(T1 &a, T2 b){if(a>b){a=b;return true;}return false;}
template<typename T1, typename T2> bool maxi(T1 &a, T2 b){if(a<b){a=b;return true;}return false;}
template<typename T> T gcd(T a, T b) { while(b) { a %= b; swap(a,b); } return a; }
template<typename T> T lcm(T a, T b) { return a/gcd(a,b)*b; }

/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Nguyen Ngoc Hung - nnhzzz
    Training for VOI24 gold medal
----------------------------------------------------------------
*/

struct FENWICK_TREE{
    vi f;
    int n;

    void update(int id, int val){
        for(; id<=n; id+=id&-id){
            f[id] += val;
        }
    }

    int get(int id){
        int res = 0;
        for(; id>0; id-=id&-id){
            res += f[id];
        }
        return res;
    }

    int get(int l, int r){
        return get(r)-get(l-1);
    }

    FENWICK_TREE(int _ = 0):n(_){
        f.resize(n+1);
    }
}fen;

int a[maxn];
set<int> s;

void ans(int val){
    cout << val << " ";
    s.erase(s.find(val));
    fen.update(val,1);
}

void solve(){
    int n; cin >> n;
    for(int i = 1; i<=n; i++){
        cin >> a[i];
    }
    for(int i = 1; i<2*n; i++){
        s.insert(i);
    }
    fen = FENWICK_TREE(n<<1|1);
    for(int i = 1; i<=n; i++){
        if(s.find(a[i])!=s.end()){
            ans(a[i]);
        }
        while(fen.get(a[i])<i){
            ans(*s.begin());
        }
        while(fen.get(a[i],2*n)<i){
            ans(*--s.end());
        }
    }
}

__nnhzzz__{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    #define name "test"
    if(fopen(name".inp","r")){
        freopen(name".inp","r",stdin);
        freopen(name".out","w",stdout);
    }
    #define name1 "nnhzzz"
    if(fopen(name1".inp","r")){
        freopen(name1".inp","r",stdin);
        freopen(name1".out","w",stdout);
    }

    int test = 1;

    while(test--){
      solve();
    }
    cerr << "\nTime elapsed: " << 1000*clock()/CLOCKS_PER_SEC << "ms\n";
    return 0;
}

Compilation message (stderr)

medians.cpp: In function 'int main()':
medians.cpp:139:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |         freopen(name".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
medians.cpp:140:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |         freopen(name".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
medians.cpp:144:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  144 |         freopen(name1".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
medians.cpp:145:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  145 |         freopen(name1".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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