oj.uz

Submission #135706

# Submission time Handle Problem Language Result Execution time Memory
135706 2019-07-24T09:55:41 Z JustasZ Sorting (IOI15_sorting) C++14
100 / 100
 583 ms 22600 KB 
#include "sorting.h"
#include <bits/stdc++.h>
#define pb push_back
#define all(a) a.begin(), a.end()
#define sz(a) (int)a.size()
#define x first
#define y second
#define debug(...) cout << "[" << #__VA_ARGS__ << ": " << __VA_ARGS__ << "]\n"
#define rd() abs((int)rng())
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int>pii;
const int maxn = 2e5 + 100;
const int mod = 1e9 + 7;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
int findSwapPairs(int n, int arr[], int m, int X[], int Y[], int P[], int Q[])
{
	auto chk = [&](int val, bool f = false) -> bool
	{
		vector<int>finalpos(n, 0);
		for(int i = 0; i < n; i++)
			finalpos[i] = i;
		for(int i = val - 1; i >= 0; i--)
			swap(finalpos[X[i]], finalpos[Y[i]]);
		vector<int>where(n), wheref(n), v(n);
		for(int i = 0; i < n; i++)
		{
			wheref[finalpos[i]] = i;
			v[i] = arr[i];
			where[v[i]] = i;
		}

		int sw = 0;
		swap(finalpos[X[sw]], finalpos[Y[sw]]);
		swap(wheref[finalpos[X[sw]]], wheref[finalpos[Y[sw]]]);
		swap(v[X[sw]], v[Y[sw]]);
		swap(where[v[X[sw]]], where[v[Y[sw]]]);
		for(int i = 0; i < n; i++)
		{
			if(finalpos[where[i]] != i)
			{
				if(sw >= val)
					return false;
				int pos = wheref[i];
				P[sw] = where[i], Q[sw] = pos;
				swap(v[pos], v[where[i]]);
				swap(where[v[pos]], where[v[where[i]]]);
				assert(finalpos[where[i]] == i);
				++sw;
				if(sw < val)
				{
					swap(finalpos[X[sw]], finalpos[Y[sw]]);
					swap(wheref[finalpos[X[sw]]], wheref[finalpos[Y[sw]]]);
					swap(v[X[sw]], v[Y[sw]]);
					swap(where[v[X[sw]]], where[v[Y[sw]]]);
				}
			}
		}
		while(sw < m)
		{
			P[sw] = Q[sw] = 0;
			++sw;
		}
		return true;
	};
	if(is_sorted(arr, arr + n))
		return 0;
	int l = 1, r = m;
	while(l < r)
	{
		int mid = (l + r) / 2;
		if(chk(mid))
			r = mid;
		else
			l = mid + 1; 
	}
	chk(l);
	return l;
}

Compilation message

sorting.cpp: In lambda function:
sorting.cpp:19:35: warning: unused parameter 'f' [-Wunused-parameter]
  auto chk = [&](int val, bool f = false) -> bool
                                   ^~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 348 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 256 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 256 KB Output is correct
20 Correct 2 ms 256 KB Output is correct
21 Correct 3 ms 616 KB Output is correct
22 Correct 4 ms 608 KB Output is correct
23 Correct 4 ms 632 KB Output is correct
24 Correct 3 ms 632 KB Output is correct
25 Correct 3 ms 632 KB Output is correct
26 Correct 3 ms 632 KB Output is correct
27 Correct 3 ms 632 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 4 ms 504 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 3 ms 552 KB Output is correct
6 Correct 3 ms 456 KB Output is correct
7 Correct 3 ms 476 KB Output is correct
8 Correct 4 ms 504 KB Output is correct
9 Correct 4 ms 504 KB Output is correct
10 Correct 4 ms 504 KB Output is correct
11 Correct 4 ms 504 KB Output is correct
12 Correct 3 ms 476 KB Output is correct
13 Correct 4 ms 476 KB Output is correct
14 Correct 3 ms 452 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 4 ms 504 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 3 ms 552 KB Output is correct
6 Correct 3 ms 456 KB Output is correct
7 Correct 3 ms 476 KB Output is correct
8 Correct 4 ms 504 KB Output is correct
9 Correct 4 ms 504 KB Output is correct
10 Correct 4 ms 504 KB Output is correct
11 Correct 4 ms 504 KB Output is correct
12 Correct 3 ms 476 KB Output is correct
13 Correct 4 ms 476 KB Output is correct
14 Correct 3 ms 452 KB Output is correct
15 Correct 390 ms 19792 KB Output is correct
16 Correct 460 ms 20304 KB Output is correct
17 Correct 571 ms 21328 KB Output is correct
18 Correct 44 ms 13384 KB Output is correct
19 Correct 389 ms 22060 KB Output is correct
20 Correct 396 ms 22600 KB Output is correct
21 Correct 410 ms 22572 KB Output is correct
22 Correct 413 ms 16728 KB Output is correct
23 Correct 453 ms 22252 KB Output is correct
24 Correct 567 ms 22112 KB Output is correct
25 Correct 583 ms 21768 KB Output is correct
26 Correct 441 ms 22536 KB Output is correct
27 Correct 400 ms 22040 KB Output is correct
28 Correct 553 ms 21924 KB Output is correct
29 Correct 528 ms 21788 KB Output is correct
30 Correct 345 ms 22224 KB Output is correct
31 Correct 581 ms 22244 KB Output is correct
32 Correct 443 ms 21456 KB Output is correct
33 Correct 577 ms 21880 KB Output is correct
34 Correct 501 ms 21808 KB Output is correct
35 Correct 381 ms 21564 KB Output is correct
36 Correct 151 ms 22164 KB Output is correct
37 Correct 568 ms 22556 KB Output is correct
38 Correct 531 ms 21568 KB Output is correct
39 Correct 550 ms 21708 KB Output is correct