Submission #772660

#	Time	Username	Problem	Language	Result	Execution time	Memory
772660		doowey	Abracadabra (CEOI22_abracadabra)	C++14	0 / 100	3062 ms	39884 KiB

Main

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = (int)2e5 + 10;

void shuffle(vector<int> &P){
    queue<int> A, B;
    for(int i = 0 ; i < P.size(); i ++ ){
        if(i < P.size() / 2) A.push(P[i]);
        else B.push(P[i]);
    }
    vector<int> nex;
    while(!A.empty() || !B.empty()){
        if(A.empty()){
            nex.push_back(B.front());
            B.pop();
        }
        else if(B.empty()){
            nex.push_back(A.front());
            A.pop();
        }
        else {
            if(A.front() < B.front()){
                nex.push_back(A.front());
                A.pop();
            }
            else{
                nex.push_back(B.front());
                B.pop();
            }
        }
    }
    swap(P, nex);
}

vector<pii> qq[N]; // {index, idx}
int res[N];

int main(){
    fastIO;
    //freopen("in.txt", "r", stdin);
    int n, q;
    cin >> n >> q;
    vector<int> P(n);
    for(int i = 0 ; i < n; i ++ ){
        cin >> P[i];
    }
    int t, id;
    for(int iq = 1; iq <= q; iq ++ ){
        cin >> t >> id;
        t=min(t,n);
        qq[t].push_back(mp(id, iq));
    }
    for(int i = 0 ; i <= n; i ++ ){
        if(i) shuffle(P);
        for(auto x : qq[i]){
            res[x.se] = P[x.fi-1];
        }
    }
    for(int iq = 1; iq <= q; iq ++ ){
        cout << res[iq] << "\n";
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void shuffle(std::vector<int>&)':
Main.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i = 0 ; i < P.size(); i ++ ){
      |                     ~~^~~~~~~~~~
Main.cpp:18:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         if(i < P.size() / 2) A.push(P[i]);
      |            ~~^~~~~~~~~~~~~~

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