oj.uz

Submission #653830

# Submission time Handle Problem Language Result Execution time Memory
653830 2022-10-28T11:56:59 Z Vladth11 Abracadabra (CEOI22_abracadabra) C++14
0 / 100
 799 ms 101404 KB 
#include <iostream>
#include <vector>
#include <set>
#include <unordered_set>
#include <algorithm>

#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "

#pragma GCC optimize("Ofast")

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;

const int bSize = 11;
const int bits = 17;
const int NMAX = 200001;
const int LIMIT = NMAX * bits;

vector <pii> qq[LIMIT + 1];
int sol[NMAX * 5];
int v[NMAX];
int poz[NMAX];
int stiva[NMAX];
int vf;
int nxt[NMAX];
pii interval[NMAX];
int aib[NMAX];

void update(int node, int x){
    for(; node < NMAX; node += node&(-node))
        aib[node] += x;
}

int query(int node){
    int x = 0;
    for(; node > 0; node -= node&(-node))
        x += aib[node];
    return x;
}

int cb(int k){
    int r = 0, pas = (1 << bits), sum = 0;
    while(pas){
        if(r + pas < NMAX && query(r + pas) < k){
            r += pas;
        }
        pas /= 2;
    }
    r++;
    return r;
}

int sz(pii x){
    if(x.second == 0)
        return 0;
    return x.second - x.first + 1;
}

int n;

void mShuffle(){
    int cine = cb(n / 2);
    if(query(cine) == n / 2){
        return;
    }
    update(cine, -sz(interval[cine]));
    int pana = query(cine - 1);
    int node = n / 2;
    node -= pana;
    interval[cine] = {poz[cine], poz[cine] + node - 1};
    update(cine, sz(interval[cine]));
    int i = v[poz[cine] + node];
    while(sz(interval[i]) == 0){
        int urm = nxt[poz[i]];
        if(urm == 0)
            urm = n + 1;
        interval[i] = {poz[i], urm - 1};
        update(i, sz(interval[i]));
        if(urm != n + 1)
            i = v[urm];
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int q, i;
    cin >> n >> q;
    for(i = 1; i <= n; i++){
        cin >> v[i];
        poz[v[i]] = i;
        while(vf && v[stiva[vf]] < v[i]){
            nxt[stiva[vf]] = i;
            vf--;
        }
        stiva[++vf] = i;
    }
    i = 1;
    while(nxt[i] != 0){
        interval[v[i]] = {i, nxt[i] - 1};
        i = nxt[i];
    }
    interval[v[i]] = {i, n};
    for(i = 1; i <= n; i++){
        update(i, sz(interval[i]));
    }
    for(i = 1; i <= q; i++){
        int x, y;
        cin >> x >> y;
        x = min(x, LIMIT);
        qq[x].push_back({y, i});
    }
    for(i = 0; i <= LIMIT; i++){
        for(auto x : qq[i]){
            int node = x.first;
            int idx = x.second;
            int cine = cb(node);
            int pana = query(cine - 1);
            node -= pana;
            sol[idx] = v[poz[cine] + node - 1];
        }
        mShuffle();
    }
    for(i = 1; i <= q; i++){
        cout << sol[i] << "\n";
    }
    return 0;
}

Compilation message

Main.cpp: In function 'int cb(int)':
Main.cpp:44:35: warning: unused variable 'sum' [-Wunused-variable]
   44 |     int r = 0, pas = (1 << bits), sum = 0;
      |                                   ^~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 671 ms 98164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 799 ms 101404 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 544 ms 85296 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 671 ms 98164 KB Output isn't correct
2 Halted 0 ms 0 KB -