oj.uz

Submission #302280

# Submission time Handle Problem Language Result Execution time Memory
302280 2020-09-18T15:15:05 Z square1001 Sorting (IOI15_sorting) C++14
0 / 100
 48 ms 384 KB 
#include "sorting.h"
#include <random>
#include <vector>
#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);
	for(int i = 0; i < M; ++i) {
		if(is_sorted(S, S + N)) {
			return i;
		}
		swap(S[X[i]], S[Y[i]]);
		if(is_sorted(S, S + N)) {
			return i + 1;
		}
		vector<int> col(N, -1);
		for(int j = 0; j < N; ++j) {
			if(col[j] != -1) continue;
			int pos = j;
			while(col[pos] == -1) {
				col[pos] = j;
				pos = S[pos];
			}
		}
		do {
			P[i] = rand_rng(0, N);
			Q[i] = rand_rng(0, N);
		} while(P[i] == Q[i] || col[P[i]] != col[Q[i]]);
	}
	if(is_sorted(S, S + N)) {
		return M;
	}
	return -1;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Incorrect 0 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Incorrect 0 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Incorrect 0 ms 256 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Incorrect 0 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 48 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 48 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -