Submission #1226275

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226275		slivajan	Abracadabra (CEOI22_abracadabra)	C++20	10 / 100	3095 ms	36412 KiB

Main

#include <bits/stdc++.h>
using namespace std;

using un = long long;
using vuc = vector<un>;
using vol = vector<bool>;

#define REP(i, a, b) for (un i = (un)a; i < (un)b; i++)
#define FEAC(i, a) for (auto&& i : a)
#define vec vector
#define ALL(x) (x).begin(), (x).end()

un N;
vuc vel;
vuc zac;

vuc A;


pair<un, un> dostat_pozicy(un i){
    i++;
    un prefSum = 0;
    un ptr = 0;

    while (prefSum + vel[ptr] < i) {
        prefSum += vel[ptr++];
    }

    return {ptr, i - prefSum - 1};

}

un dostat(un i){
    auto [a, b] = dostat_pozicy(i);
    return A[zac[a] + b];
}

bool doStep(){
    auto [a, b] = dostat_pozicy(N/2);

    if (b == 0) return true;

    un nej = -1;
    REP(i, zac[a]+b, zac[a]+vel[a]){
        if (A[i] > nej) nej = A[i];
        vel[nej]++;
    }

    vel[a] = b;

    return false;
}

int main(){
    un Q; cin >> N >> Q;

    A = vuc(N); FEAC(a, A) cin >> a;
    FEAC(a, A) a--;

    vel = vuc(N, 0);
    zac = vuc(N, -1);

    vec<tuple<un, un, un>> queries;
    REP(i, 0, Q){
        un a, b; cin >> a >> b;
        b--;
        queries.emplace_back(a, b, i);
    }

    sort(ALL(queries));

    un nej = -1;
    REP(i, 0, N){
        zac[A[i]] = i;
        if (A[i] > nej) nej = A[i];
        vel[nej]++;
    }

    vuc rets(Q, -1);
    un qIndex = 0;

    un t = 0;

    while(qIndex < Q){
        while((qIndex < Q) and (get<0>(queries[qIndex]) == t)){
            auto [ignore, i, j] = queries[qIndex];
            rets[j] = dostat(i);
            qIndex++;
        }

        bool hotovo = doStep();
        t++;

        if (hotovo) break;
    }

    while(qIndex < Q){
        auto [ignore, i, j] = queries[qIndex];
        rets[j] = dostat(i);
        qIndex++;
    }



    FEAC(ret, rets) cout << ret+1 << endl;

}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25