結果

問題 No.2809 Sort Query
ユーザー umimel
提出日時 2024-07-12 22:54:40
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 817 ms / 2,000 ms
コード長 3,730 bytes
コンパイル時間 2,523 ms
コンパイル使用メモリ 190,820 KB
実行使用メモリ 38,320 KB
最終ジャッジ日時 2024-07-12 22:55:29
合計ジャッジ時間 49,055 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
other AC * 71
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function 'void solve()':
main.cpp:108:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  108 |     for(auto [type, k, x] : query){
      |              ^

ソースコード

diff # 

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
const ll MOD1000000007 = 1000000007;
const ll MOD998244353 = 998244353;
const ll MOD[3] = {999727999, 1070777777, 1000000007};
const ll LINF = 1LL << 60LL;
const int IINF = (1 << 30) - 1;


template<typename T>
struct fenwick_tree{
    int n;
    vector<T> dat;

    // constractor
    fenwick_tree(){}
    
    fenwick_tree(int n) : n(n){
        dat.resize(n+1, 0);
    }

    /*
        - return sum in range [0, i]
        - query time : O(log n)
    */
    T sum(int i){
        T s = 0;
        while(i > 0){
            s += dat[i];
            i -= i & -i;
        }
        return s;
    }

    /*
        - return sum in range [l, r)
        - query time : O(log n)
    */
    T sum(int l, int r){
        return sum(r) - sum(l);
    }

    /*
        - add x to dat[i+1]
        - processing time : O(log n)
    */
   void add(int i, T x){
        i++;
        while(i <= n){
            dat[i] += x;
            i += i & -i;
        }
    }
};


void solve(){
    int n, q; cin >> n >> q;
    vector<ll> a(n);
    for(int i=0; i<n; i++) cin >> a[i];
    vector<tuple<int, int, ll>> query(q+n);
    for(int i=0; i<n; i++){
        query[i] = {1, i, a[i]};
        a[i] = 0;
    }
    q += n;
    for(int i=n; i<q; i++){
        int type; cin >> type;
        if(type == 1){
            int k;
            ll x;
            cin >> k >> x;
            query[i] = {1, k-1, x};
        }
        if(type == 2){
            query[i] = {2, -1, -1};
        }
        if(type == 3){
            int k; cin >> k;
            query[i] = {3, k-1, -1};
        }
    }

    int siz = 0;
    vector<ll> comp;
    for(int i=0; i<q; i++) comp.pb(get<2>(query[i]));
    sort(all(comp));
    comp.erase(unique(all(comp)), comp.end());
    for(int i=0; i<q; i++){
        int tmp = lower_bound(all(comp), get<2>(query[i])) - comp.begin();
        query[i] = {get<0>(query[i]), get<1>(query[i]), tmp};
    }
    siz = (int)comp.size();

    fenwick_tree<int> ft1(siz), ft2(n);
    ft1.add(0, n);
    set<int> st;
    for(auto [type, k, x] : query){
        if(type == 1){
            if(a[k] == 0){
                int cnt = k+1 - ft2.sum(0, k+1);
                int lo = 0, mid, hi = siz-1; 
                while(hi - lo > 1){
                    mid = (lo + hi)/2;

                    if(cnt <= ft1.sum(0, mid+1)) hi = mid;
                    else lo = mid;
                }

                ft1.add(hi, -1);
                st.insert(k);
                ft2.add(k, 1);
            }
            a[k] = x;
        }
        if(type == 2){
            for(auto idx : st){
                ft1.add(a[idx], 1);
                ft2.add(idx, -1);
                a[idx] = 0;
            }
            set<int> new_st;
            st = new_st;
        }
        if(type == 3){
            int ans = 0;
            if(a[k] != 0){
                ans = a[k];
            }else{
                int cnt = k+1 - ft2.sum(0, k+1);
                int lo = 0, mid, hi = siz-1; 
                while(hi - lo > 1){
                    mid = (lo + hi)/2;

                    if(cnt <= ft1.sum(0, mid+1)) hi = mid;
                    else lo = mid;
                }

                ans = hi;
            }

            cout << comp[ans] << '\n';
        }
    }
}

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    int T=1;
    //cin >> T;
    while(T--) solve();
}
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