oj.uz

Submission #364453

# Submission time Handle Problem Language Result Execution time Memory
364453 2021-02-09T08:23:08 Z r57shell Bubble Sort 2 (JOI18_bubblesort2) C++14
17 / 100
 9000 ms 3436 KB 
#include "bubblesort2.h"
#include <set>
#include <algorithm>

using namespace std;

static int stupid(vector<int> A)
{
	int res = 0;
	int n = A.size();
	while (true)
	{
		bool was = false;
		for (int i = 1; i < n; ++i)
		{
			if (A[i-1] > A[i])
			{
				swap(A[i-1], A[i]);
				was = true;
			}
		}
		if (was)
			++res;
		else
			break;
	}
	return res;
}

static int get(vector<int> &f, int x)
{
	int res = 0;
	for (; x >= 0; x = (x&(x+1))-1)
		res += f[x];
	return res;
}

static void add(vector<int> &f, int x, int v)
{
	for (; x < f.size(); x |= (x+1))
		f[x] += v;
}

static int stupid1(vector<int> A)
{
	int n = A.size();
	int res = 0;
	for (int i = 1; i < n; ++i)
	{
		int c = 0;
		for (int j = 0; j < i; ++j)
			if (A[i] < A[j])
				++c;
		res = max(res, c);
	}
	return res;
}

static int smart(const vector<int> &A, vector<int> &F, const vector<int> &all)
{
	int n = A.size();
	int res = 0;
	for (int i = 0; i < n; ++i)
	{
		res = max(res, i - get(F, A[i]));
		add(F, A[i], 1);
	}
	for (int i = 0; i < n; ++i)
		add(F, A[i], -1);
	return res;
}

static int smart1(const vector<int> &A)
{
	int n = A.size();
	int res = 0;
	int p = int(2e9);
	for (int i = n - 1; i > 0; --i)
	{
		if (A[i] < p)
		{
			p = A[i];
			int c = 0;
			for (int j = 0; j < i; ++j)
				if (A[i] < A[j])
					++c;
			res = max(res, c);
		}
	}
	return res;
}

void merge(vector<int> &res, const vector<int> &a, const vector<int> &b)
{
	int i, j, k;
	res.resize(a.size()+b.size());
	k = 0;
	for (i = 0, j = 0; i < a.size() && j < b.size(); )
	{
		if (a[i] < b[j])
			res[k++] = a[i++];
		else
			res[k++] = b[j++];
	}
	for (; i < a.size(); ++i, ++k)
		res[k] = a[i];
	for (; j < b.size(); ++j, ++k)
		res[k] = b[j];
}

static int smart2(const vector<int> &A, vector<vector<int>> &T)
{
	int n = A.size();
	int res = 0;
	int p = int(2e9);
	for (int i = 0; i < n; ++i)
		T[i+n].assign(1, A[i]);
	for (int i = n - 1; i > 0; --i)
		merge(T[i], T[i*2], T[i*2+1]);
	for (int i = n - 1; i > 0; --i)
	{
		if (A[i] < p)
		{
			p = A[i];
			int c = 0;
			int l = 0 + n;
			int r = i + n;
			while (l <= r)
			{
				if (l&1)
					c += T[l].size() - (lower_bound(T[l].begin(), T[l].end(), p + 1) - T[l].begin());
				if (!(r&1))
					c += T[r].size() - (lower_bound(T[r].begin(), T[r].end(), p + 1) - T[r].begin());
				l = (l+1)/2;
				r = (r-1)/2;
			}
			res = max(res, c);
		}
	}
	return res;
}

static int smart3(const vector<int> &A, vector<vector<int>> &T)
{
	int n = A.size();
	int res = 0;
	int p = int(2e9);
	for (int i = 0; i < n; ++i)
		T[i].clear();
	/*for (int i = 0; i < n; ++i)
		printf("%d ", A[i]);
	printf("\n");*/
	for (int i = 0; i < n; ++i)
	{
		//for (int x = i; x < n; x = (x|(x+1)))
		//	T[x].push_back(A[i]);
			//T[x].insert(lower_bound(T[x].begin(), T[x].end(), A[i]), A[i]);
		vector<int> v(1, A[i]);
		vector<int> v1;
		int y = (i&(i+1))-1;
		for (int x = i - 1; x > y; x = (x&(x+1))-1)
		{
			merge(v1, v, T[x]);
			swap(v1, v);
		}
		T[i] = v;
	}
	for (int i = n - 1; i > 0; --i)
	{
		if (A[i] < p)
		{
			p = A[i];
			int c = 0;
			for (int x = i; x >= 0; x = (x&(x+1))-1)
				c += T[x].size() - (lower_bound(T[x].begin(), T[x].end(), p + 1) - T[x].begin());
			res = max(res, c);
		}
	}
	return res;
}

vector<int> countScans(vector<int> A, vector<int> X, vector<int> V)
{
	int Q = X.size();
	int N = A.size();
	vector<int> answer(Q);
	vector<vector<int>> T(2*N);
	for (int j = 0; j < Q; ++j)
	{
		A[X[j]] = V[j];
		answer[j] = smart3(A, T);
	}
	return answer;
	vector<int> all(N + Q);
	for (int i = 0; i < N; ++i)
		all[i] = A[i];
	for (int i = 0; i < Q; ++i)
		all[N+i] = V[i];
	sort(all.begin(), all.end());
	vector<int>::iterator z = unique(all.begin(), all.end());
	all.resize(z - all.begin());
	/*for (int j = 0; j < all.size(); ++j)
		printf("%d ", all[j]);
	printf("\n");*/
	if (all.back() <= 100)
	{
		vector<int> T[101];
		for (int x = 0; x <= 100; ++x)
			T[x].resize(2*N);
		for (int j = 0; j < N; ++j) 
			for (int x = A[j] - 1; x >= 0; --x)
				add(T[x], j, 1);
		set<int> pos[101];
		for (int j = 0; j < N; ++j) 
			pos[A[j]].insert(-j);
		for (int j = 0; j < Q; j++)
		{
			int p = X[j];
			for (int x = A[p] - 1; x >= 0; --x)
			{
				add(T[x], p, -1);
			}
			pos[A[p]].erase(-p);
			A[p] = V[j];
			for (int x = V[j] - 1; x >= 0; --x)
				add(T[x], p, 1);
			pos[V[j]].insert(-p);
			int ans = 0;
			for (int x = 0; x <= 100; ++x)
				if (pos[x].size())
				{
					ans = max(ans, get(T[x], -*(pos[x].begin())));
				}
			answer[j] = ans;
		}
	}
	else
	{
		for (int j = 0; j < N; j++)
			A[j] = lower_bound(all.begin(), all.end(), A[j]) - all.begin();
		for (int j = 0; j < Q; j++)
			V[j] = lower_bound(all.begin(), all.end(), V[j]) - all.begin();vector<int> F(all.size());
		for (int j = 0; j < Q; j++)
		{
			A[X[j]] = V[j];
			answer[j] = smart(A, F, all);
		}
	}
	return answer;
}

Compilation message

bubblesort2.cpp: In function 'void add(std::vector<int>&, int, int)':
bubblesort2.cpp:40:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for (; x < f.size(); x |= (x+1))
      |         ~~^~~~~~~~~~
bubblesort2.cpp: In function 'void merge(std::vector<int>&, const std::vector<int>&, const std::vector<int>&)':
bubblesort2.cpp:98:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |  for (i = 0, j = 0; i < a.size() && j < b.size(); )
      |                     ~~^~~~~~~~~~
bubblesort2.cpp:98:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |  for (i = 0, j = 0; i < a.size() && j < b.size(); )
      |                                     ~~^~~~~~~~~~
bubblesort2.cpp:105:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |  for (; i < a.size(); ++i, ++k)
      |         ~~^~~~~~~~~~
bubblesort2.cpp:107:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  107 |  for (; j < b.size(); ++j, ++k)
      |         ~~^~~~~~~~~~
bubblesort2.cpp: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:241:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  241 |   for (int j = 0; j < Q; j++)
      |   ^~~
bubblesort2.cpp:242:67: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  242 |    V[j] = lower_bound(all.begin(), all.end(), V[j]) - all.begin();vector<int> F(all.size());
      |                                                                   ^~~~~~
bubblesort2.cpp: At global scope:
bubblesort2.cpp:111:12: warning: 'int smart2(const std::vector<int>&, std::vector<std::vector<int> >&)' defined but not used [-Wunused-function]
  111 | static int smart2(const vector<int> &A, vector<vector<int>> &T)
      |            ^~~~~~
bubblesort2.cpp:73:12: warning: 'int smart1(const std::vector<int>&)' defined but not used [-Wunused-function]
   73 | static int smart1(const vector<int> &A)
      |            ^~~~~~
bubblesort2.cpp:44:12: warning: 'int stupid1(std::vector<int>)' defined but not used [-Wunused-function]
   44 | static int stupid1(vector<int> A)
      |            ^~~~~~~
bubblesort2.cpp:7:12: warning: 'int stupid(std::vector<int>)' defined but not used [-Wunused-function]
    7 | static int stupid(vector<int> A)
      |            ^~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 492 KB Output is correct
2 Correct 92 ms 492 KB Output is correct
3 Correct 528 ms 492 KB Output is correct
4 Correct 528 ms 620 KB Output is correct
5 Correct 625 ms 620 KB Output is correct
6 Correct 829 ms 604 KB Output is correct
7 Correct 853 ms 604 KB Output is correct
8 Correct 826 ms 620 KB Output is correct
9 Correct 576 ms 620 KB Output is correct
10 Correct 635 ms 620 KB Output is correct
11 Correct 639 ms 604 KB Output is correct
12 Correct 637 ms 620 KB Output is correct
13 Correct 667 ms 620 KB Output is correct
14 Correct 637 ms 732 KB Output is correct
15 Correct 635 ms 604 KB Output is correct
16 Correct 629 ms 492 KB Output is correct
17 Correct 636 ms 604 KB Output is correct
18 Correct 630 ms 640 KB Output is correct

Subtask #2
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 492 KB Output is correct
2 Correct 92 ms 492 KB Output is correct
3 Correct 528 ms 492 KB Output is correct
4 Correct 528 ms 620 KB Output is correct
5 Correct 625 ms 620 KB Output is correct
6 Correct 829 ms 604 KB Output is correct
7 Correct 853 ms 604 KB Output is correct
8 Correct 826 ms 620 KB Output is correct
9 Correct 576 ms 620 KB Output is correct
10 Correct 635 ms 620 KB Output is correct
11 Correct 639 ms 604 KB Output is correct
12 Correct 637 ms 620 KB Output is correct
13 Correct 667 ms 620 KB Output is correct
14 Correct 637 ms 732 KB Output is correct
15 Correct 635 ms 604 KB Output is correct
16 Correct 629 ms 492 KB Output is correct
17 Correct 636 ms 604 KB Output is correct
18 Correct 630 ms 640 KB Output is correct
19 Correct 7452 ms 1260 KB Output is correct
20 Execution timed out 9096 ms 1260 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Execution timed out 9032 ms 3436 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 492 KB Output is correct
2 Correct 92 ms 492 KB Output is correct
3 Correct 528 ms 492 KB Output is correct
4 Correct 528 ms 620 KB Output is correct
5 Correct 625 ms 620 KB Output is correct
6 Correct 829 ms 604 KB Output is correct
7 Correct 853 ms 604 KB Output is correct
8 Correct 826 ms 620 KB Output is correct
9 Correct 576 ms 620 KB Output is correct
10 Correct 635 ms 620 KB Output is correct
11 Correct 639 ms 604 KB Output is correct
12 Correct 637 ms 620 KB Output is correct
13 Correct 667 ms 620 KB Output is correct
14 Correct 637 ms 732 KB Output is correct
15 Correct 635 ms 604 KB Output is correct
16 Correct 629 ms 492 KB Output is correct
17 Correct 636 ms 604 KB Output is correct
18 Correct 630 ms 640 KB Output is correct
19 Correct 7452 ms 1260 KB Output is correct
20 Execution timed out 9096 ms 1260 KB Time limit exceeded
21 Halted 0 ms 0 KB -