oj.uz

Submission #302532

# Submission time Handle Problem Language Result Execution time Memory
302532 2020-09-18T18:31:21 Z square1001 Sorting (IOI15_sorting) C++14
74 / 100
 1000 ms 9336 KB 
#include "sorting.h"
#include <random>
#include <vector>
#include <cassert>
#include <iostream>
#include <algorithm>
using namespace std;
mt19937 mt(2009190008);
int rand_rng(int l, int r) {
	uniform_int_distribution<int> p(l, r - 1);
	return p(mt);
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	fill(P, P + M, 0);
	fill(Q, Q + M, 0);
	if(is_sorted(S, S + N)) {
		return 0;
	}
	int L = 0;
	while(true) {
		swap(S[X[L]], S[Y[L]]);
		++L;
		vector<bool> vis(N, false);
		int cycles = 0;
		for(int i = 0; i < N; ++i) {
			if(vis[i]) continue;
			int pos = i;
			++cycles;
			while(!vis[pos]) {
				vis[pos] = true;
				pos = S[pos];
			}
		}
		int steps = N - cycles;
		if(L >= steps) break;
	}
	vector<bool> vis2(N, false);
	int cl = 0;
	for(int i = 0; i < N; ++i) {
		if(vis2[i]) continue;
		vector<int> path;
		int pos = i;
		while(!vis2[pos]) {
			path.push_back(pos);
			vis2[pos] = true;
			pos = S[pos];
		}
		for(int j = int(path.size()) - 1; j >= 1; --j) {
			P[cl] = path[j - 1];
			Q[cl] = path[j];
			++cl;
		}
	}
	for(int i = 0; i < L; ++i) {
		if(P[i] == Q[i]) continue;
		for(int j = L - 1; j >= i + 1; --j) {
			if(X[j] == Y[j]) continue;
			if(X[j] == P[i] && Y[j] != Q[i]) {
				P[i] = Y[j];
			}
			else if(X[j] == Q[i] && Y[j] != P[i]) {
				Q[i] = Y[j];
			}
			else if(Y[j] == P[i] && X[j] != Q[i]) {
				P[i] = X[j];
			}
			else if(Y[j] == Q[i] && X[j] != P[i]) {
				Q[i] = X[j];
			}
		}
	}
	return L;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 416 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 256 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 416 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 256 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 2 ms 512 KB Output is correct
22 Correct 2 ms 512 KB Output is correct
23 Correct 2 ms 512 KB Output is correct
24 Correct 2 ms 512 KB Output is correct
25 Correct 2 ms 512 KB Output is correct
26 Correct 2 ms 512 KB Output is correct
27 Correct 2 ms 512 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 384 KB Output is correct
2 Correct 18 ms 384 KB Output is correct
3 Correct 17 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 11 ms 384 KB Output is correct
8 Correct 18 ms 384 KB Output is correct
9 Correct 18 ms 384 KB Output is correct
10 Correct 18 ms 384 KB Output is correct
11 Correct 18 ms 384 KB Output is correct
12 Correct 11 ms 384 KB Output is correct
13 Correct 20 ms 544 KB Output is correct
14 Correct 1 ms 544 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 384 KB Output is correct
2 Correct 18 ms 384 KB Output is correct
3 Correct 17 ms 384 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 11 ms 384 KB Output is correct
8 Correct 18 ms 384 KB Output is correct
9 Correct 18 ms 384 KB Output is correct
10 Correct 18 ms 384 KB Output is correct
11 Correct 18 ms 384 KB Output is correct
12 Correct 11 ms 384 KB Output is correct
13 Correct 20 ms 544 KB Output is correct
14 Correct 1 ms 544 KB Output is correct
15 Execution timed out 1071 ms 9336 KB Time limit exceeded
16 Halted 0 ms 0 KB -