Submission #861197

#	Time	Username	Problem	Language	Result	Execution time	Memory
861197		vgtcross	Abracadabra (CEOI22_abracadabra)	C++17	10 / 100	3017 ms	27216 KiB

Main

#include <bits/stdc++.h>

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

void solve() {
    int n, q;
    cin >> n >> q;
    
    vector<int> a(n), b(n);
    for (int &i : a) cin >> i;
    
    vector<array<int, 3>> que(q);
    for (int i = 0; i < q; ++i) {
        cin >> que[i][0] >> que[i][1];
        que[i][2] = i;
    }
    
    sort(que.begin(), que.end());
    vector<int> ans(q);
    
    int j = 0;
    for (int i = 0; true; ++i) {
        while (j < q && que[j][0] == i) {
            ans[que[j][2]] = a[que[j][1]-1];
            ++j;
        }
        
        int x = 0, y = 0, z = n/2;
        while (y < n/2 && z < n) {
            if (a[y] < a[z]) b[x++] = a[y++];
            else b[x++] = a[z++];
        }
        
        while (y < n/2) b[x++] = a[y++];
        while (z < n) b[x++] = a[z++];
        if (a == b) break;
        a = b;
    }
    
    while (j < q) {
        ans[que[j][2]] = a[que[j][1]-1];
        ++j;
    }
    
    for (int i = 0; i < q; ++i) cout << ans[i] << '\n';
}

int main() {
    cin.tie(0) -> sync_with_stdio(0);
    
    solve();
}

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