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Submission #225877

# Submission time Handle Problem Language Result Execution time Memory
225877 2020-04-21T21:38:04 Z staniewzki Sorting (IOI15_sorting) C++17
100 / 100
 442 ms 11492 KB 
#include<bits/stdc++.h>
using namespace std;
 
#define REP(i, n) for(int i = 0; i < n; i++)
 
#include "sorting.h"

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	auto check = [&](int R) {
		vector<int> s(N), ws(N), wf(N);
		REP(i, N) s[i] = S[i];
		auto f = s;
		REP(i, R) swap(f[X[i]], f[Y[i]]);
		REP(i, N) {
			ws[S[i]] = i;
			wf[f[i]] = i;
		}

		int j = 0;
		REP(i, R) {
			int &p = s[X[i]], &q = s[Y[i]];
			swap(p, q);
			swap(ws[p], ws[q]);

			while(j < N && j == f[j]) j++;
			if(j < N) {
				int &a = ws[j], &b = ws[f[j]], &x = wf[j], &y = wf[f[j]];
				P[i] = a, Q[i] = b;
				swap(a, b), swap(s[a], s[b]);
				swap(x, y), swap(f[x], f[y]);
			}
			else P[i] = Q[i] = 0;
		}
		REP(i, N) if(i != s[i]) return false;
		return true;
	};

	int l = 0, r = M;
	while(l < r) {
		int m = (l + r) / 2;
		if(check(m))
			r = m;
		else
			l = m + 1;
	}

	check(l);
	return l;
}

Subtask #1
8.0 / 8.0

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

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 256 KB Output is correct
9 Correct 4 ms 128 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

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

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 256 KB Output is correct
9 Correct 4 ms 128 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 4 ms 256 KB Output is correct
19 Correct 4 ms 384 KB Output is correct
20 Correct 4 ms 256 KB Output is correct
21 Correct 8 ms 512 KB Output is correct
22 Correct 6 ms 512 KB Output is correct
23 Correct 6 ms 512 KB Output is correct
24 Correct 5 ms 512 KB Output is correct
25 Correct 6 ms 512 KB Output is correct
26 Correct 6 ms 512 KB Output is correct
27 Correct 6 ms 512 KB Output is correct

Subtask #5
20.0 / 20.0

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

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 7 ms 512 KB Output is correct
3 Correct 6 ms 512 KB Output is correct
4 Correct 6 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 6 ms 384 KB Output is correct
7 Correct 6 ms 384 KB Output is correct
8 Correct 6 ms 384 KB Output is correct
9 Correct 6 ms 384 KB Output is correct
10 Correct 6 ms 512 KB Output is correct
11 Correct 7 ms 384 KB Output is correct
12 Correct 6 ms 384 KB Output is correct
13 Correct 6 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 317 ms 10128 KB Output is correct
16 Correct 358 ms 10292 KB Output is correct
17 Correct 422 ms 10872 KB Output is correct
18 Correct 147 ms 10524 KB Output is correct
19 Correct 291 ms 11128 KB Output is correct
20 Correct 305 ms 11492 KB Output is correct
21 Correct 305 ms 11476 KB Output is correct
22 Correct 327 ms 10984 KB Output is correct
23 Correct 375 ms 11208 KB Output is correct
24 Correct 438 ms 11192 KB Output is correct
25 Correct 425 ms 10944 KB Output is correct
26 Correct 302 ms 11352 KB Output is correct
27 Correct 274 ms 11140 KB Output is correct
28 Correct 404 ms 11088 KB Output is correct
29 Correct 384 ms 10992 KB Output is correct
30 Correct 216 ms 11192 KB Output is correct
31 Correct 397 ms 11208 KB Output is correct
32 Correct 360 ms 10836 KB Output is correct
33 Correct 421 ms 11128 KB Output is correct
34 Correct 392 ms 11152 KB Output is correct
35 Correct 305 ms 10888 KB Output is correct
36 Correct 118 ms 11380 KB Output is correct
37 Correct 442 ms 11460 KB Output is correct
38 Correct 401 ms 10944 KB Output is correct
39 Correct 438 ms 11020 KB Output is correct