Submission #1014124

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014124		atom	Abracadabra (CEOI22_abracadabra)	C++17	10 / 100	149 ms	18256 KiB

Main

#include "bits/stdc++.h"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;

#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif

const int N = 1e5 + 5;

vector <int> ans[N];
signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    
    #ifdef JASPER
        freopen("in1", "r", stdin);
    #endif

    int n, q; 
    cin >> n >> q;
    vector <int> a(n);
    for (int i = 0; i < n; ++i) cin >> a[i];

    if (n <= 1000) {
        int m = n / 2;
        ans[0] = a;
        for (int t = 1; t <= n; ++t) {
            queue <int> l, r;
            vector <int> b;

            for (int i = 0; i < m; ++i) l.push(a[i]);
            for (int i = m; i < n; ++i) r.push(a[i]);

            while (!l.empty() || !r.empty()) {
                if (!l.empty() && !r.empty() && l.front() < r.front()) {
                    b.push_back(l.front());
                    l.pop();
                }
                if (!l.empty() && !r.empty() && l.front() > r.front()) {
                    b.push_back(r.front());
                    r.pop();
                }
                if (l.empty()) {
                    while (!r.empty()) {
                        b.push_back(r.front());
                        r.pop();
                    }
                }
                if (r.empty()) {
                    while (!l.empty()) {
                        b.push_back(l.front());
                        l.pop();
                    }
                } 
            }
            debug(b);
            ans[t] = b;
            a = b;
        }

        while (q--) {
            int x, i;
            cin >> x >> i;
            x = min(x, n);

            cout << ans[x][i - 1] << "\n";
        }
    }

    
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:9:20: warning: statement has no effect [-Wunused-value]
    9 | #define debug(...) 166
      |                    ^~~
Main.cpp:59:13: note: in expansion of macro 'debug'
   59 |             debug(b);
      |             ^~~~~

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