oj.uz

Submission #812304

# Submission time Handle Problem Language Result Execution time Memory
812304 2023-08-07T08:17:30 Z LIF Sorting (IOI15_sorting) C++14
100 / 100
 139 ms 28516 KB 
#include "sorting.h"
#include<bits/stdc++.h>
using namespace std;
int a[300005];
vector<pair<int,int> > last;
int pos[300005];
int AA[300005][2];
int val[300005][2];
vector<pair<int,int> > pp;
bool check(int now,int X[],int Y[],int N,int S[])
{
	for(int i=0;i<N;i++)a[i] = S[i];
	for(int i=0;i<now;i++)swap(a[X[i]],a[Y[i]]);
	for(int i=0;i<N;i++)pos[a[i]] = i;
	int ans = 0;
	vector<pair<int,int> > temp;
	for(int i=0;i<N;i++)
	{
		if(a[i] == i)continue;
		int aa = i;
		int bb = pos[i];
		swap(a[aa],a[bb]);
		pos[a[bb]] = bb;
		temp.push_back(make_pair(aa,bb));
		ans++;
	}
	if(temp.size() > now)return false;
	if(temp.size() < now)for(int i=1;i<= now-temp.size();i++)temp.push_back(make_pair(0,0));
	if(ans <= now)
	{
		pp = temp;
		return true;
	}
	else return false;
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
{
	for(int i=0;i<N;i++)a[i] = S[i];
 	int needtime = 0;
	int l = 0;
	int r = M;
	while(l <= r)
	{
		int mid = (l+r)>>1;
		if(check(mid,X,Y,N,S) == true)
		{
			r = mid - 1;
			needtime = mid;
		}
		else l = mid + 1;
	}
	for(int i=0;i<N;i++)
	{
		a[i] = S[i];
		pos[a[i]] = i;
	}
	for(int i=0;i<needtime;i++)last.push_back(make_pair(X[i],Y[i]));
	for(int i=0;i<needtime;i++)last.push_back(pp[i]);
	/*for(int i=0;i<last.size();i++)cout<<last[i].first<<" "<<last[i].second<<endl;
	cout<<endl;*/
	for(int i=needtime;i<needtime*2;i++)
	{
		AA[i-needtime][0] = last[i].first;
		AA[i-needtime][1] = last[i].second;
	}
	for(int i=0;i<needtime;i++)
	{
		swap(a[X[i]],a[Y[i]]);
		swap(pos[a[X[i]]],pos[a[Y[i]]]);
	}
	for(int i=0;i<needtime;i++)// we find all 
	{
		val[i][0] = a[AA[i][0]];
		val[i][1] = a[AA[i][1]];
		swap(a[AA[i][0]],a[AA[i][1]]);
		swap(pos[a[AA[i][0]]],pos[a[AA[i][1]]]);
	}
	for(int i=0;i<N;i++)
	{
		a[i] = S[i];
		pos[a[i]] = i;
	}
	/*for(int i=0;i<needtime;i++)
	{
		cout<<val[i][0]<<" "<<val[i][1]<<endl;
	}
	cout<<endl;*/
	for(int i=0;i<needtime;i++)
	{
		swap(a[X[i]],a[Y[i]]);
		swap(pos[a[X[i]]],pos[a[Y[i]]]);
		
		P[i] = pos[val[i][0]];
		Q[i] = pos[val[i][1]];
		
		swap(a[P[i]],a[Q[i]]);
		swap(pos[a[P[i]]],pos[a[Q[i]]]);
	}
	//test:
	for(int i=0;i<N;i++)a[i] = S[i];
	for(int i=0;i<needtime;i++)
	{
		swap(a[X[i]],a[Y[i]]);
		swap(a[P[i]],a[Q[i]]);
	}
	/*for(int i=0;i<N;i++)cout<<a[i]<<" ";
	cout<<endl;*/
	return needtime;
}

Compilation message

sorting.cpp: In function 'bool check(int, int*, int*, int, int*)':
sorting.cpp:27:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |  if(temp.size() > now)return false;
      |     ~~~~~~~~~~~~^~~~~
sorting.cpp:28:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |  if(temp.size() < now)for(int i=1;i<= now-temp.size();i++)temp.push_back(make_pair(0,0));
      |     ~~~~~~~~~~~~^~~~~
sorting.cpp:28:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  if(temp.size() < now)for(int i=1;i<= now-temp.size();i++)temp.push_back(make_pair(0,0));
      |                                   ~^~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 260 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 260 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 260 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 316 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 588 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 596 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 448 KB Output is correct
7 Correct 1 ms 456 KB Output is correct
8 Correct 1 ms 540 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 1 ms 452 KB Output is correct
6 Correct 1 ms 448 KB Output is correct
7 Correct 1 ms 456 KB Output is correct
8 Correct 1 ms 540 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 118 ms 25440 KB Output is correct
16 Correct 124 ms 25848 KB Output is correct
17 Correct 138 ms 27348 KB Output is correct
18 Correct 50 ms 19616 KB Output is correct
19 Correct 89 ms 24324 KB Output is correct
20 Correct 94 ms 25416 KB Output is correct
21 Correct 95 ms 25436 KB Output is correct
22 Correct 110 ms 22640 KB Output is correct
23 Correct 131 ms 28332 KB Output is correct
24 Correct 137 ms 27840 KB Output is correct
25 Correct 137 ms 27472 KB Output is correct
26 Correct 96 ms 24828 KB Output is correct
27 Correct 92 ms 23672 KB Output is correct
28 Correct 132 ms 27324 KB Output is correct
29 Correct 128 ms 26172 KB Output is correct
30 Correct 76 ms 21076 KB Output is correct
31 Correct 128 ms 26604 KB Output is correct
32 Correct 123 ms 27336 KB Output is correct
33 Correct 136 ms 27812 KB Output is correct
34 Correct 131 ms 27752 KB Output is correct
35 Correct 88 ms 24384 KB Output is correct
36 Correct 46 ms 18640 KB Output is correct
37 Correct 139 ms 28516 KB Output is correct
38 Correct 135 ms 27348 KB Output is correct
39 Correct 135 ms 27564 KB Output is correct