제출 #1162222

#제출 시각아이디문제언어결과실행 시간메모리
1162222Mher777Abracadabra (CEOI22_abracadabra)C++20
0 / 100
750 ms26692 KiB
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <cassert>
#include <fstream>
using namespace std;
mt19937 rnd(time(nullptr));

/* -------------------- Typedefs -------------------- */

typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;

/* -------------------- Usings -------------------- */

using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

/* -------------------- Defines -------------------- */

#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"Yes\n"
#define no cout<<"No\n"
#define all(x) (x).begin(), (x).end()
#define USACO freopen("feast.in", "r", stdin); freopen("feast.out", "w", stdout);

/* -------------------- Constants -------------------- */

const int dx[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
const int dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18) + 5ll;
const ll MOD = ll(1000000007);
const ll MOD2 = ll(998244353);

/* -------------------- Functions -------------------- */

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}

void precision(int x) {
    cout.setf(ios::fixed | ios::showpoint);
    cout.precision(x);
}

ll gcd(ll a, ll b) {
    if (a == 0 || b == 0) return(max(a, b));
    while (b) {
        a %= b;
        swap(a, b);
    }
    return a;
}

ll lcm(ll a, ll b) {
    return a / gcd(a, b) * b;
}

ll range_sum(ll a, ll b) {
    if (a > b) return 0ll;
    ll dif = a - 1, cnt = b - a + 1;
    ll ans = ((b - a + 1) * (b - a + 2)) / 2;
    ans += ((b - a + 1) * dif);
    return ans;
}

string dec_to_bin(ll a) {
    string s = "";
    for (ll i = a; i > 0; ) {
        ll k = i % 2;
        i /= 2;
        char c = k + 48;
        s += c;
    }
    if (a == 0) {
        s = "0";
    }
    reverse(all(s));
    return s;
}

ll bin_to_dec(string s) {
    ll num = 0;
    for (int i = 0; i < s.size(); i++) {
        num *= 2ll;
        num += (s[i] - '0');
    }
    return num;
}

ll factorial_by_mod(ll n, ll mod) {
    ll ans = 1;
    ll num;
    for (ll i = 1; i <= n; ++i) {
        num = i % mod;
        ans *= num;
        ans %= mod;
    }
    return ans;
}

bool isPrime(ll a) {
    if (a == 1) return false;
    for (ll i = 2; i * i <= a; i++) {
        if (a % i == 0) return false;
    }
    return true;
}

ll binpow(ll a, ll b) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
        }
        b >>= 1;
        a *= a;
    }
    return ans;
}

ll binpow_by_mod(ll a, ll b, ll mod) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
            ans %= mod;
        }
        b >>= 1;
        a *= a;
        a %= mod;
    }
    return ans;
}

/* -------------------- Solution -------------------- */

const int N = 200005;
int a[N], id[N], sz[N], par[N], ans[N];
int t[N * 4];
pii ran[N];
vector<pii> harc[N];
int n, q, m;

void bld(int l = 1, int r = n, int pos = 1) {
    if (l == r) {
        par[l] = pos;
        t[pos] = sz[l];
        return;
    }
    int mid = (l + r) / 2;
    bld(l, mid, 2 * pos);
    bld(mid + 1, r, 2 * pos + 1);
    t[pos] = t[2 * pos] + t[2 * pos + 1];
}

int qry(int l, int r, int tl = 1, int tr = n, int pos = 1) {
    if (l == tl && r == tr) {
        return t[pos];
    }
    int mid = (tl + tr) / 2;
    if (mid >= r) {
        return qry(l, r, tl, mid, 2 * pos);
    }
    if (mid < l) {
        return qry(l, r, mid + 1, tr, 2 * pos + 1);
    }
    return qry(l, mid, tl, mid, 2 * pos) + qry(mid + 1, r, mid + 1, tr, 2 * pos + 1);
}

void upd(int pos, int val) {
    pos = par[pos];
    t[pos] = val;
    pos /= 2;
    while (pos) {
        t[pos] = t[2 * pos] + t[2 * pos + 1];
        pos /= 2;
    }
}

void slv() {
    cin >> n >> q;
    m = n / 2;
    int ind = 1;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
        id[a[i]] = i;
        if (a[i] > a[ind] || i == m + 1 || i == 1) {
            ind = i;
            ran[a[ind]] = { ind,ind };
        }
        ++sz[a[ind]];
        ran[a[ind]].ss = ind + sz[a[ind]] - 1;
    }
    bld();
    for (int i = 1; i <= q; ++i) {
        int t, ind;
        cin >> t >> ind;
        if (t == 0) {
            ans[i] = a[ind];
        }
        harc[min(t, n)].pub({ ind,i });
    }
    for (int qq = 1; qq <= n; ++qq) {
        int l = 1, r = n, mid = 0, len = 0, num = 0;
        while (l <= r) {
            mid = (l + r) / 2;
            int resp = qry(1, mid);
            if (resp >= m) {
                len = resp;
                num = mid;
                r = mid - 1;
            }
            else {
                l = mid + 1;
            }
        }
        for (auto elem : harc[qq]) {
            int ind = elem.ff;
            l = 1, r = n, mid;
            int root = -1, length = 0;
            while (l <= r) {
                mid = (l + r) / 2;
                int resp = qry(1, mid);
                if (resp >= ind) {
                    root = mid;
                    length = resp;
                    r = mid - 1;
                }
                else {
                    l = mid + 1;
                }
            }
            ans[elem.ss] = a[ran[root].ss - (length - ind)];
        }
        if (len == m) continue;
        int half1 = m - (len - sz[num]), half2 = len - m;
        sz[num] = half1;
        ran[num].ss = ran[num].ff + half1 - 1;
        int ind = ran[num].ss + 1;
        sz[a[ind]] = half2;
        ran[a[ind]] = { ind, ind + half2 - 1 };
        upd(num, sz[num]);
        upd(a[ind], sz[a[ind]]);
    }
    for (int i = 1; i <= q; ++i) {
        cout << ans[i] << '\n';
    }
}

void cs() {
    int tstc = 1;
    //cin >> tstc;
    while (tstc--) {
        slv();
    }
}

void precalc() {
    return;
}

int main() {
    fastio();
    precalc();
    //precision(0);
    cs();
    return 0;
}
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...