답안 #438386

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
438386	2021-06-27T22:14:16 Z	ruadhan	정렬하기 (IOI15_sorting)	C++11	100 / 100	279 ms	16252 KB

sorting

#include "sorting.h"
#include <bits/stdc++.h>

using namespace std;

const int MX = 1e5 + 5;
int n, m;
vector<int> s, x, y;
vector<int> a, revA, en, revEn;

bool valid(int t)
{
	a = s;
	for (int i = 0; i < t; i++)
		swap(a[x[i]], a[y[i]]);
	for (int i = 0; i < n; i++)
		revA[a[i]] = i;
	int cnt = 0;
	for (int i = 0; i < n; i++)
		if (a[i] != i)
		{
			int j = revA[i];
			swap(revA[a[i]], revA[a[j]]);
			swap(a[i], a[j]);
			cnt++;
		}
	return cnt <= t;
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
{
	n = N, m = M;
	s.resize(N), x.resize(N), y.resize(N), a.resize(N), revA.resize(N), en.resize(N), revEn.resize(N);

	for (int i = 0; i < N; i++)
	{
		s.at(i) = S[i];
		x.at(i) = X[i];
		y.at(i) = Y[i];
	}
	int R = 0;
	for (int b = N / 2; b >= 1; b /= 2)
	{
		while (R + b <= M && !valid(R + b))
			R += b;
	}
	if (R == 0)
		R += (valid(R) ? 0 : 1);
	else
		R++;

	a = s;
	for (int i = 0; i < n; i++)
		revA[a[i]] = i;
	en = a;
	for (int i = 0; i < R; i++)
		swap(en[x[i]], en[y[i]]);
	for (int i = 0; i < n; i++)
		revEn[en[i]] = i;

	queue<pair<int, int>> changes;
	vector<int> tmp = en;

	for (int i = 0; i < n; i++)
		if (tmp[i] != i)
		{
			int j = revEn[i];
			swap(revEn[tmp[i]], revEn[tmp[j]]);
			swap(tmp[i], tmp[j]);
			changes.push({i, j});
		}
	for (int i = 0; i < R; i++)
	{
		swap(revA[a[x[i]]], revA[a[y[i]]]);
		swap(a[x[i]], a[y[i]]);
		if (!changes.empty())
		{
			auto change = changes.front();
			changes.pop();
			P[i] = revA[en[change.first]];
			Q[i] = revA[en[change.second]];
			swap(en[change.first], en[change.second]);
			swap(revA[a[P[i]]], revA[a[Q[i]]]);
			swap(a[P[i]], a[Q[i]]);
		}
		else
			P[i] = Q[i] = 1;
	}

	return R;
}

Subtask #1

8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct

Subtask #2

12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	304 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct

Subtask #3

16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct

Subtask #4

18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	332 KB	Output is correct
11	Correct	1 ms	304 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	2 ms	460 KB	Output is correct
22	Correct	2 ms	460 KB	Output is correct
23	Correct	2 ms	460 KB	Output is correct
24	Correct	2 ms	460 KB	Output is correct
25	Correct	2 ms	460 KB	Output is correct
26	Correct	1 ms	460 KB	Output is correct
27	Correct	2 ms	460 KB	Output is correct

Subtask #5

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	2 ms	460 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	2 ms	332 KB	Output is correct
7	Correct	2 ms	344 KB	Output is correct
8	Correct	2 ms	332 KB	Output is correct
9	Correct	2 ms	332 KB	Output is correct
10	Correct	2 ms	460 KB	Output is correct
11	Correct	2 ms	460 KB	Output is correct
12	Correct	2 ms	332 KB	Output is correct
13	Correct	2 ms	460 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct

Subtask #6

26.0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	332 KB	Output is correct
2	Correct	2 ms	460 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	2 ms	332 KB	Output is correct
7	Correct	2 ms	344 KB	Output is correct
8	Correct	2 ms	332 KB	Output is correct
9	Correct	2 ms	332 KB	Output is correct
10	Correct	2 ms	460 KB	Output is correct
11	Correct	2 ms	460 KB	Output is correct
12	Correct	2 ms	332 KB	Output is correct
13	Correct	2 ms	460 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	235 ms	13824 KB	Output is correct
16	Correct	265 ms	14060 KB	Output is correct
17	Correct	261 ms	14816 KB	Output is correct
18	Correct	72 ms	11076 KB	Output is correct
19	Correct	178 ms	13528 KB	Output is correct
20	Correct	186 ms	14088 KB	Output is correct
21	Correct	196 ms	14148 KB	Output is correct
22	Correct	230 ms	15132 KB	Output is correct
23	Correct	263 ms	15344 KB	Output is correct
24	Correct	273 ms	15132 KB	Output is correct
25	Correct	272 ms	14900 KB	Output is correct
26	Correct	170 ms	14132 KB	Output is correct
27	Correct	173 ms	13508 KB	Output is correct
28	Correct	250 ms	16252 KB	Output is correct
29	Correct	229 ms	15640 KB	Output is correct
30	Correct	118 ms	12656 KB	Output is correct
31	Correct	230 ms	15980 KB	Output is correct
32	Correct	269 ms	14916 KB	Output is correct
33	Correct	279 ms	15264 KB	Output is correct
34	Correct	259 ms	15148 KB	Output is correct
35	Correct	185 ms	13480 KB	Output is correct
36	Correct	66 ms	11844 KB	Output is correct
37	Correct	261 ms	15476 KB	Output is correct
38	Correct	222 ms	14900 KB	Output is correct
39	Correct	272 ms	15016 KB	Output is correct