Submission #789124

#	Time	Username	Problem	Language	Result	Execution time	Memory
789124		ymm	Abracadabra (CEOI22_abracadabra)	C++17	10 / 100	600 ms	524288 KiB

Main

#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (r); ++x)
typedef long long ll;
using namespace std;

vector<int> shf(vector<int> vec)
{
	int n = vec.size();
	vector<int> ans;
	int p0 = 0, p1 = n/2;
	Loop (_,0,n) {
		if (p1 == n || (p0 < n/2 && vec[p0] < vec[p1]))
			ans.push_back(vec[p0++]);
		else
			ans.push_back(vec[p1++]);
	}
	return ans;
}

vector<vector<int>> vecs;

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	int n, q;
	cin >> n >> q;
	vector<int> vec(n);
	for (int &x : vec)
		cin >> x;
	vecs.push_back(vec);
	for (;;) {
		vec = shf(vec);
		if (vecs.back() == vec)
			break;
		vecs.push_back(vec);
	}
	while (q--) {
		int t, i;
		cin >> t >> i;
		--i;
		t = min<int>(t, vecs.size()-1);
		cout << vecs[t][i] << '\n';
	}
}

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