Submission #764851

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
764851	2023-06-24T05:42:15 Z	SanguineChameleon	Sorting (IOI15_sorting)	C++17	36 / 100	49 ms	848 KB

sorting

#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;

const int maxN = 2e5 + 20;
int cnt[maxN];

mt19937 gen(69420);

bool cmp(int i, int j) {
	return cnt[i] < cnt[j];
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	for (int i = 0; i < M; i++) {
		cnt[X[i]]++;
		cnt[Y[i]]++;
	}
	int len = 0;
	for (int i = 0; ; i++) {
		bool ok = true;
		for (int j = 0; j < N; j++) {
			if (S[j] != j) {
				ok = false;
				break;
			}
		}
		if (ok) {
			return len;
		}
		assert(i < M);
		cnt[X[i]]--;
		cnt[Y[i]]--;
		swap(S[X[i]], S[Y[i]]);
		vector<int> wrong;
		for (int j = 0; j < N; j++) {
			if (S[j] != j) {
				wrong.push_back(j);
			}
		}
		if (wrong.empty()) {
			P[len] = 0;
			Q[len] = 0;
		}
		else {
			if ((int)wrong.size() >= 10) {
				sort(wrong.begin(), wrong.end(), cmp);
				shuffle(wrong.begin(), wrong.begin() + 10, gen);
			}
			else {
				shuffle(wrong.begin(), wrong.end(), gen);
			}
			P[len] = wrong[0];
			for (int j = 0; j < N; j++) {
				if (S[j] == wrong[0]) {
					Q[len] = j;
					break;
				}
			}
		}
		swap(S[P[len]], S[Q[len]]);
		len++;
	}
}

Subtask #1

8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct

Subtask #2

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct

Subtask #3

16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct

Subtask #4

0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	0 ms	212 KB	Output is correct
7	Correct	0 ms	212 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	0 ms	212 KB	Output is correct
19	Correct	0 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Runtime error	49 ms	848 KB	Execution killed with signal 6
22	Halted	0 ms	0 KB	-

Subtask #5

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	47 ms	388 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #6

0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	47 ms	388 KB	Output isn't correct
2	Halted	0 ms	0 KB	-