Submission #708637

#	Time	Username	Problem	Language	Result	Execution time	Memory
708637		becaido	Abracadabra (CEOI22_abracadabra)	C++17	10 / 100	3041 ms	30620 KiB

Main

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout (T t, U...u) {cout << t << (sizeof... (u) ? ", " : ""), dout (u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 2e5 + 5;
const int QSIZ = 1e6 + 5;

int n, q;
int ans[QSIZ];
vector<int> a;
tuple<int, int, int> ask[QSIZ];

vector<int> deal(vector<int> a) {
    vector<int> re;
    for (int i1 = 0, i2 = a.size() / 2; i1 < a.size() / 2 || i2 < a.size();) {
        if (i1 == a.size() / 2) re.pb(a[i2++]);
        else if (i2 == a.size()) re.pb(a[i1++]);
        else if (a[i1] < a[i2]) re.pb(a[i1++]);
        else re.pb(a[i2++]);
    }
    return re;
}

void solve() {
    cin >> n >> q;
    a.resize(n);
    for (int &x : a) cin >> x;
    FOR (i, 1, q) {
        auto &[t, p, id] = ask[i];
        cin >> t >> p;
        id = i;
    }
    sort(ask + 1, ask + q + 1);
    auto last = a;
    int cur = 0;
    bool f = 1;
    FOR (i, 1, q) {
        auto [t, p, id] = ask[i];
        while (f && cur < t) {
            cur++;
            a = deal(a);
            if (a == last) f = 0;
            last = a;
        }
        ans[id] = a[p - 1];
    }
    FOR (i, 1, q) cout << ans[i] << '\n';
}

int main() {
    Waimai;
    solve();
}

Compilation message (stderr)

Main.cpp: In function 'std::vector<int> deal(std::vector<int>)':
Main.cpp:32:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i1 = 0, i2 = a.size() / 2; i1 < a.size() / 2 || i2 < a.size();) {
      |                                         ~~~^~~~~~~~~~~~~~
Main.cpp:32:65: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i1 = 0, i2 = a.size() / 2; i1 < a.size() / 2 || i2 < a.size();) {
      |                                                              ~~~^~~~~~~~~~
Main.cpp:33:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         if (i1 == a.size() / 2) re.pb(a[i2++]);
      |             ~~~^~~~~~~~~~~~~~~
Main.cpp:34:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         else if (i2 == a.size()) re.pb(a[i1++]);
      |                  ~~~^~~~~~~~~~~

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