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Submission #82207

# Submission time Handle Problem Language Result Execution time Memory
82207 2018-10-29T13:27:28 Z pamaj Doktor (COCI17_doktor) C++14
50 / 100
 1000 ms 8620 KB 
#include <bits/stdc++.h>
using namespace std;
const int maxn = 5e5 + 10;

int v[maxn], pfsum[maxn] , n;
int pos[maxn];

int main()
{

	cin >> n;
	for(int i = 1; i <= n; i++)
	{
		cin >> v[i];
		pos[v[i]] = i;
		if(v[i] == i) 
		{
			pfsum[i] = pfsum[i - 1] + 1;
		}
	}

	vector<pair<int, int>> p;

	for(int i = 1; i <= n; i++)
	{
		if(v[i] == i) continue;
		int ini = v[i], fim = pos[v[i]];
		if(ini > fim) swap(ini, fim);
		p.push_back({ini, fim});
	}

	int best = 0;
	pair<int, int> bp;
	for(auto u : p)
	{

		int ans = 0;
		int i = u.first, j = u.second;
		ans += pfsum[i - 1];
		ans += pfsum[n] - pfsum[j];

		int mid = (u.second - u.first)/2;
		for(int cont = 0; cont < mid; cont++)
		{
			swap(v[u.first + cont], v[u.second - cont]);
		} 
		for(int z = u.first; z <= u.second; z++)
		{
			if(v[z] == z) ans++;
		}
		for(int cont = 0; cont < mid; cont++)
		{
			swap(v[u.first + cont], v[u.second - cont]);
		}
		if(ans > best)
		{
			best = ans;
			bp.first = v[u.first], bp.second = v[u.second];
		}
	}

	//cout << best << "\n";
	if(bp.first == 0 and bp.second == 0) 
	{
		for(int i = 1; i <= n; i++)
		{
			if(v[i] == i) cout << i << " " << i << "\n";
			return 0;		
		}
	}

	cout << bp.first << " " << bp.second << "\n";

	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 556 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 556 KB Output is correct
2 Correct 4 ms 556 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 756 KB Output is correct
2 Correct 7 ms 756 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 756 KB Output is correct
2 Correct 2 ms 756 KB Output is correct

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 872 KB Output is correct
2 Execution timed out 1065 ms 7124 KB Time limit exceeded

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1074 ms 7124 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1080 ms 8620 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1080 ms 8620 KB Time limit exceeded
2 Halted 0 ms 0 KB -