1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
#include <iostream>
#include <map>
#include <set>
#include <vector>
#include <bitset>

using namespace std;

int t[3005], spojna[3005], rep[3005], it, a, b, wszystkie, indeks[3005];
set <int> s;
map<int, int> m;
int v[3005], wstecz[3005];
vector<pair<int, int> > zap[3];
bool zrobione[3005];
bitset<3005> zamienione, odwiedzone;
int main()
{
	int n;
	
	cin >> n;
	wszystkie = n;
	
	for(int i = 1; i <= n; ++i)
	{
		cin >> t[i];
		s.insert(t[i]);
	}
	
	int nowy_numer = 1;
	
	for(int i : s)
	{
		m[i] = nowy_numer;
		nowy_numer++;
	}
	
	for(int i = 1; i <= n; ++i)
	{
		t[i] = m[t[i]];
		v[i] = t[i];
		wstecz[t[i]] = i;
	}
	int a, b;
	
	for(int i = 1; i <= n; ++i)
	{
		int x = i;
		if(odwiedzone[x]) continue;

		while(true)
		{
			a = v[x];
			b = wstecz[x];
						
			if(a == b) break;
			odwiedzone[a] = 1;
			odwiedzone[b] = 1;
			
			zap[0].push_back({a, b});
				
			wstecz[v[a]] = b;
			swap(v[a], v[b]);
			wstecz[x] = a;
			
			x = b;
		}
	}
	
	for(int i = 1; i <= n; ++i)
	{
		if(v[i] > i ) zap[1].push_back({i, v[i]});
	}
		
	if(zap[0].empty() && zap[1].empty()) cout << 0 << "\n";
	else if(zap[0].empty() && !zap[1].empty())
	{
		cout << 1 << "\n";
		cout << (int)zap[1].size() * 2 << "\n";
		for(int i = 0; i <(int)zap[1].size(); ++i) cout << zap[1][i].first << " ";
		for(int i = (int)zap[1].size() - 1; ~i; --i) cout << zap[1][i].second << " ";
	}
	else if(!zap[0].empty() && zap[1].empty())
	{
		cout << 1 << "\n";
		cout << (int)zap[0].size() * 2 << "\n";
		for(int i = 0; i <(int)zap[0].size(); ++i) cout << zap[0][i].first << " ";
		for(int i = (int)zap[0].size() - 1; ~i; --i) cout << zap[0][i].second << " ";
	}
	else
	{
		cout << 2 << "\n";
		cout << (int)zap[0].size() * 2 << "\n";
		for(int i = 0; i <(int)zap[0].size(); ++i) cout << zap[0][i].first << " ";
		for(int i = (int)zap[0].size() - 1; ~i; --i) cout << zap[0][i].second << " ";

		
		 cout << "\n" << (int)zap[1].size() * 2 << "\n";
		for(int i = 0; i <(int)zap[1].size(); ++i) cout << zap[1][i].first << " ";
		for(int i = (int)zap[1].size() - 1; ~i; --i) cout << zap[1][i].second << " ";
	}
	

		
	return 0;
}