Submission #523489

#	Time	Username	Problem	Language	Result	Execution time	Memory
523489		blue	Studentsko (COCI14_studentsko)	C++17	100 / 100	5 ms	604 KiB

studentsko

#include <iostream>
#include <map>
#include <vector>
#include <algorithm>
#include <numeric>
using namespace std;

int* v;

using vi = vector<int>;

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	int N, K;
	cin >> N >> K;

	map<int, int> ct;

	v = new int[1+N];
	for(int i = 1; i <= N; i++)
	{
		cin >> v[i];
		ct[v[i]] = 0;
	}

	int x = -1;
	for(auto& z : ct) z.second = ++x;

	for(int i = 1; i <= N; i++) v[i] = ct[v[i]] / K;


	vi BIT(1+N, 0);

	vi I(N);
	iota(I.begin(), I.end(), 1);

	sort(I.begin(), I.end(), [] (int p, int q)
	{
		if(v[p] == v[q]) return p < q;
		else return v[p] < v[q];
	});

	int res = N;

	// for(int i = 1; i <= N; i++) cerr << v[i] << ' ';
	// 	cerr << '\n';

	for(int i : I)
	{


		// cerr << "\n\n";
		// cerr << "i = " << i << '\n';
		int curr = 1;

		// for(int z = 1; z <= N; z++) cerr << BIT[z] << ' ';
		// 	cerr << "\n";

		for(int j = i-1; j >= 1; j -= j&-j)
			curr = max(curr, BIT[j] + 1);

		// cerr << "curr = " << curr << '\n';

		res = min(res, N - curr);

		for(int j = i; j <= N; j += j&-j)
			BIT[j] = max(BIT[j], curr);
	}

	cout << res << '\n';
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10