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Datatähti 2024 alku

Käännöt

  • Start: 2023-10-30 00:00:00
  • End: 2023-11-13 00:00:00
CSES - Datatähti 2024 alku - Results
Submission details
Task:Käännöt
Sender:cppbetter
Submission time:2023-11-01 01:47:42 +0200
Language:C++ (C++20)
Status:READY
Result:32
Feedback
groupverdictscore
#1ACCEPTED13
#2ACCEPTED19
#30
#40
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1details
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#11ACCEPTED0.01 s2details
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#16ACCEPTED0.02 s2details
#17ACCEPTED0.00 s3details
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#190.01 s3details
#20ACCEPTED0.01 s3details
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#22ACCEPTED0.01 s3details
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#240.01 s3details
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#26ACCEPTED0.00 s4details
#270.00 s4details
#280.00 s4details
#290.00 s4details
#300.00 s4details
#310.00 s4details
#320.00 s4details
#330.00 s4details
#340.00 s4details

Code

#include <iostream>
#include <vector>
#include <array>
#include <algorithm>

using namespace std;

vector<int> list;

void swp2(int l)
{
    swap(list[l], list[l + 1]);
}

void swp3(int l)
{
    swap(list[l], list[l + 2]);
}

void swp4(int l)
{
    swap(list[l], list[l + 3]);
    swap(list[l+1], list[l + 2]);
}

void swp5(int l)
{
    swap(list[l], list[l + 4]);
    swap(list[l + 1], list[l + 3]);
}

int main()
{
    int n, k;

    vector<int> op;
    op.reserve(1000000);

#if 1
    cin >> n >> k;

    list.resize(n);

    for (int i = 0; i < n; i++)
    {
        int a;
        cin >> a;

        list[i] = a;
    }
#else
    k = 4;
    n = 500;

    list.resize(n);


    srand(time(0));

    n = 500;
    list.resize(n);

    for (int i = 0; i < n; i++)
    {
        list[i] = i + 1;
    }

    //array<int, 15> rev = { 1, 6, 8, 1, 7, 6, 7, 6, 8, 7, 8, 7, 8, 9, 8 };
    //for (auto e : rev)
    //{
    //    e += n - 12;
    //    swp4(e - 1);
    //    op.push_back(e);
    //}
    //
    //return 0;


    // reverse l
    op.clear();

    reverse(list.begin(), list.end());

    for (int i = 0; i < 15000; i++)
    {
        int a = rand() % (n - k);
        swp4(a);
        op.push_back(a + 1);
    }

#endif

    bool canDo = true;

    switch (k)
    {
    case 2:
        for (int i = 1; i <= n; i++)
        {
            auto pos = find(list.begin(), list.end(), i);
            int posI = pos - list.begin();

            while (posI + 1 != i)
            {
                swp2(posI - 1);
                op.push_back(posI);

                pos = find(list.begin(), list.end(), i);
                posI = pos - list.begin();
            }
        }

        break;
    case 3:
        for (int i = 1; i <= n; i++)
        {
            auto pos = find(list.begin(), list.end(), i);
            int posI = pos - list.begin();

            if ((posI + 1) % 2 != i % 2)
            {
                canDo = false;
                break;
            }

            while (posI + 1 != i)
            {
                swp3(posI - 2);
                op.push_back(posI - 1);

                pos = find(list.begin(), list.end(), i);
                posI = pos - list.begin();
            }
        }

        break;
    case 4:
        for (int i = 1; i <= n; i++)
        {
            auto pos = find(list.begin(), list.end(), i);
            int posI = pos - list.begin();

            if (((posI + 1) % 3 + 2) % 3 == i % 3)
            {
                if ((posI + 1) - 3 > i - 1)
                {
                    swp4(posI - 3);
                    op.push_back(posI - 2);

                    pos = find(list.begin(), list.end(), i);
                    posI = pos - list.begin();
                }
                if ((posI + 1) - 2 > i - 1 && posI + 1 < n)
                {
                    swp4(posI - 2);
                    op.push_back(posI - 1);
                }
                else if (posI + 3 < n)
                {
                    swp4(posI - 1);
                    op.push_back(posI);
                    swp4(posI);
                    op.push_back(posI + 1);
                }
                else if (posI + 4 < n)
                {
                    swp4(posI);
                    op.push_back(posI + 1);
                    swp4(posI + 1);
                    op.push_back(posI + 2);
                }
                else
                {
                    bool fixd = false;

                    for (int g = 0; g < 2; g++)
                    {
                        if (list[(n - 1) - 3] == n - 1 && list[(n - 1) - 2] == n - 3 && list[(n - 1) - 1] == n - 2)
                        {
                            array<int, 23> rev = { 2, 3, 3, 3, 1, 1, 2, 1, 2, 3, 2, 1, 1, 1, 1, 3, 2, 1, 3, 2, 3, 2, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 3] == n - 1 && list[(n - 1) - 2] == n && list[(n - 1) - 1] == n - 3)
                        {
                            array<int, 21> rev = { 3, 1, 3, 3, 2, 1, 2, 2, 2, 3, 1, 2, 2, 2, 3, 3, 2, 3, 2, 4, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 3] == n - 2 && list[(n - 1) - 2] == n - 1 && list[(n - 1) - 1] == n - 3)
                        {
                            array<int, 19> rev = { 3, 2, 1, 1, 1, 3, 3, 3, 2, 1, 1, 2, 2, 3, 3, 1, 2, 1, 2 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 2] == n && list[(n - 1) - 1] == n - 2)
                        {
                            array<int, 24> rev = { 3, 2, 3, 2, 3, 1, 2, 2, 2, 3, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 2] == n - 1 && list[(n - 1) - 1] == n)
                        {
                            array<int, 11> rev = { 7, 6, 8, 7, 6, 7, 6, 7, 9, 8, 9 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 12;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }

                        swp4(n - 4);
                        op.push_back(n - 3);
                    }
                    if (!fixd)
                    {
                        canDo = false;
                        //cout << list[(n - 1) - 4] << " " << list[(n - 1) - 3] << " " << list[(n - 1) - 2] << " " << list[(n - 1) - 1] << " " << list[n - 1] << "\n";
                        //cout << op.size() << "\n";
                        //for (auto e : op)
                        //    cout << e << ", ";

                        return 0;
                    }

                    break;

                    break;
                }
            }
            if (((posI + 1) % 3 + 1) % 3 == i % 3)
            {
                if ((posI + 1) - 3 > i - 1)
                {
                    swp4(posI - 3);
                    op.push_back(posI - 2);

                    pos = find(list.begin(), list.end(), i);
                    posI = pos - list.begin();
                }
                if ((posI + 1) - 1 > i - 1 && posI + 2 < n)
                {
                    swp4(posI - 1);
                    op.push_back(posI);
                }
                else if (posI + 5 < n)
                {
                    swp4(posI);
                    op.push_back(posI + 1);
                    swp4(posI + 1);
                    op.push_back(posI);
                    swp4(posI + 2);
                    op.push_back(posI + 3);
                }
                else
                {
                    bool fixd = false;

                    for (int g = 0; g < 2; g++)
                    {
                        if (list[(n - 1) - 3] == n - 1 && list[(n - 1) - 2] == n - 3 && list[(n - 1) - 1] == n - 2)
                        {
                            array<int, 23> rev = { 2, 3, 3, 3, 1, 1, 2, 1, 2, 3, 2, 1, 1, 1, 1, 3, 2, 1, 3, 2, 3, 2, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 3] == n - 1 && list[(n - 1) - 2] == n && list[(n - 1) - 1] == n - 3)
                        {
                            array<int, 21> rev = { 3, 1, 3, 3, 2, 1, 2, 2, 2, 3, 1, 2, 2, 2, 3, 3, 2, 3, 2, 4, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 3] == n - 2 && list[(n - 1) - 2] == n - 1 && list[(n - 1) - 1] == n - 3)
                        {
                            array<int, 19> rev = { 3, 2, 1, 1, 1, 3, 3, 3, 2, 1, 1, 2, 2, 3, 3, 1, 2, 1, 2 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 2] == n && list[(n - 1) - 1] == n - 2)
                        {
                            array<int, 24> rev = { 3, 2, 3, 2, 3, 1, 2, 2, 2, 3, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 7;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }
                        else if (list[(n - 1) - 2] == n - 1 && list[(n - 1) - 1] == n)
                        {
                            array<int, 11> rev = { 7, 6, 8, 7, 6, 7, 6, 7, 9, 8, 9 };
                            reverse(rev.begin(), rev.end());
                            for (auto e : rev)
                            {
                                e += n - 12;
                                swp4(e - 1);
                                op.push_back(e);
                            }

                            fixd = true;
                        }

                        swp4(n - 4);
                        op.push_back(n - 3);
                    }
                    if(!fixd)
                    {
                        //canDo = false;
                        //cout << list[(n - 1) - 4] << " " << list[(n - 1) - 3] << " " << list[(n - 1) - 2] << " " << list[(n - 1) - 1] << " " << list[n - 1] << "\n";
                        //cout << op.size() << "\n";
                        //for (auto e : op)
                        //    cout << e << ", ";

                        return 0;
                    }

                    break;
                }
            }

            pos = find(list.begin(), list.end(), i);
            posI = pos - list.begin();

            while (posI + 1 != i)
            {
                swp4(posI - 3);
                op.push_back(posI - 2);

                pos = find(list.begin(), list.end(), i);
                posI = pos - list.begin();
            }
        }

        break;
    case 5:
        break;
    }

    if (op.size() > 100000)
        canDo = false;

    if (canDo)
    {
        cout << "YES\n";
        cout << op.size() << "\n";
    
        for (auto e : op)
            cout << e << " ";
    }
    else
        cout << "NO\n";
    

    //if (!is_sorted(list.begin(), list.end()))
    //    cout << "NO!\n";
    //}

    return 0;
}

// Cases REVERSE TO REVERSE EFFECT:
// (8) 7 8 5 6: 3, 1, 3, 3, 2, 1, 2, 2, 2, 3, 1, 2, 2, 2, 3, 3, 2, 3, 2, 4, 3,
// (8) 7 5 6 8: 2, 3, 3, 3, 1, 1, 2, 1, 2, 3, 2, 1, 1, 1, 1, 3, 2, 1, 3, 2, 3, 2, 3,
// (8) 5 8 6 7: 2 4 3 2 3 2 4 3 4 3 4 5 4
// (8) 6 7 5 8: 3, 2, 1, 1, 1, 3, 3, 3, 2, 1, 1, 2, 2, 3, 3, 1, 2, 1, 2,
// (12) 9 12 10 11: 3, 2, 3, 2, 3, 1, 2, 2, 2, 3, 2, 3, 2, 3, 2, 1, 2, 1, 2, 3, 2, 3, 4, 3
// (12) 9 11 12 10: 7 6 8 7 6 7 6 7 9 8 9

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
5 2
1 2 3 4 5
view save

correct output
YES
0
view save

user output
YES
0
view save

Test 2

Group: 1

Verdict: ACCEPTED

input
5 2
2 1 3 4 5
view save

correct output
YES
1
1
view save

user output
YES
1
1 
view save

Test 3

Group: 1

Verdict: ACCEPTED

input
20 2
6 20 18 2 16 13 19 17 8 14 11 ...
view save

correct output
YES
366
2 3 4 5 6 7 8 9 10 11 12 13 14...
view save

user output
YES
132
19 18 17 16 15 14 13 12 11 10 ...
Truncated

Test 4

Group: 1

Verdict: ACCEPTED

input
100 2
100 92 62 88 12 7 43 31 19 72 ...
view save

correct output
YES
2876
1 2 3 4 5 6 7 8 9 10 11 12 13 ...
view save

user output
YES
2438
77 76 75 74 73 72 71 70 69 68 ...
Truncated

Test 5

Group: 1

Verdict: ACCEPTED

input
100 2
100 99 98 97 96 95 94 93 92 91...
view save

correct output
YES
5248
1 2 3 4 5 6 7 8 9 10 11 12 13 ...
view save

user output
YES
4950
99 98 97 96 95 94 93 92 91 90 ...
Truncated

Test 6

Group: 2

Verdict: ACCEPTED

input
5 3
1 2 3 4 5
view save

correct output
YES
0
view save

user output
YES
0
view save

Test 7

Group: 2

Verdict: ACCEPTED

input
5 3
3 5 4 1 2
view save

correct output
NO
view save

user output
NO
view save

Test 8

Group: 2

Verdict: ACCEPTED

input
5 3
5 2 1 4 3
view save

correct output
YES
8
1 2 1 3 1 2 3 1
view save

user output
YES
2
1 3 
view save

Test 9

Group: 2

Verdict: ACCEPTED

input
20 3
19 14 1 18 3 4 11 20 13 6 17 8...
view save

correct output
YES
52
8 10 12 14 16 18 1 3 5 7 9 11 ...
view save

user output
YES
42
1 12 10 8 6 4 2 3 6 4 11 9 7 5...
Truncated

Test 10

Group: 2

Verdict: ACCEPTED

input
20 3
9 6 13 18 5 10 3 2 7 20 1 4 19...
view save

correct output
YES
50
10 12 14 16 18 13 15 17 4 6 8 ...
view save

user output
YES
34
9 7 5 3 1 6 4 2 7 5 3 10 8 6 4...
view save

Test 11

Group: 2

Verdict: ACCEPTED

input
500 3
53 52 21 76 25 142 5 4 83 176 ...
view save

correct output
YES
15194
334 336 338 340 342 344 346 34...
view save

user output
YES
15174
67 65 63 61 59 57 55 53 51 49 ...
Truncated

Test 12

Group: 2

Verdict: ACCEPTED

input
500 3
51 44 147 172 1 28 27 82 233 1...
view save

correct output
YES
15565
366 368 370 372 374 376 378 38...
view save

user output
YES
15543
3 1 108 106 104 102 100 98 96 ...
Truncated

Test 13

Group: 2

Verdict: ACCEPTED

input
500 3
75 46 179 62 221 14 67 154 89 ...
view save

correct output
YES
15920
454 456 458 460 462 464 466 46...
view save

user output
YES
15902
75 73 71 69 67 65 63 61 59 57 ...
Truncated

Test 14

Group: 2

Verdict: ACCEPTED

input
500 3
161 54 285 12 71 142 111 94 97...
view save

correct output
YES
15931
408 410 412 414 416 418 420 42...
view save

user output
YES
15907
275 273 271 269 267 265 263 26...
Truncated

Test 15

Group: 2

Verdict: ACCEPTED

input
500 3
122 260 455 113 315 276 433 43...
view save

correct output
NO
view save

user output
NO
view save

Test 16

Group: 2

Verdict: ACCEPTED

input
500 3
499 500 497 498 495 496 493 49...
view save

correct output
YES
62264
2 4 6 8 10 12 14 16 18 20 22 2...
view save

user output
YES
62250
497 495 493 491 489 487 485 48...
Truncated

Test 17

Group: 3

Verdict: ACCEPTED

input
5 4
1 2 3 4 5
view save

correct output
YES
0
view save

user output
YES
0
view save

Test 18

Group: 3

Verdict: ACCEPTED

input
5 4
5 1 2 3 4
view save

correct output
YES
4
1 2 1 2
view save

user output
YES
4
1 2 1 2 
view save

Test 19

Group: 3

Verdict:

input
500 4
58 14 107 124 4 113 24 290 56 ...
view save

correct output
YES
15698
389 392 395 398 401 404 407 41...
view save

user output
YES
14677
24 23 22 19 16 13 10 7 4 1 19 ...
Truncated

Test 20

Group: 3

Verdict: ACCEPTED

input
500 4
113 187 278 242 23 67 48 298 3...
view save

correct output
YES
15004
480 481 480 482 485 488 491 49...
view save

user output
YES
13781
265 262 259 256 253 250 247 24...
Truncated

Test 21

Group: 3

Verdict: ACCEPTED

input
500 4
5 233 199 35 213 354 11 134 30...
view save

correct output
YES
16770
458 461 464 467 470 473 476 47...
view save

user output
YES
15407
227 225 223 220 217 214 211 20...
Truncated

Test 22

Group: 3

Verdict: ACCEPTED

input
500 4
169 47 21 137 57 138 360 147 4...
view save

correct output
YES
15889
497 371 372 371 373 376 379 38...
view save

user output
YES
14691
58 55 52 49 46 43 40 37 34 31 ...
Truncated

Test 23

Group: 3

Verdict:

input
500 4
493 409 291 313 156 443 496 40...
view save

correct output
YES
22886
480 481 480 482 485 488 491 49...
view save

user output
YES
21754
338 336 334 331 328 325 322 31...
Truncated

Test 24

Group: 3

Verdict:

input
500 4
137 99 100 226 326 298 140 340...
view save

correct output
NO
view save

user output
(empty)

Test 25

Group: 3

Verdict: ACCEPTED

input
500 4
500 499 498 497 496 495 494 49...
view save

correct output
YES
41458
1 2 1 2 5 8 11 14 17 20 23 26 ...
view save

user output
YES
41421
497 495 493 490 487 484 481 47...
Truncated

Test 26

Group: 4

Verdict: ACCEPTED

input
5 5
1 2 3 4 5
view save

correct output
YES
0
view save

user output
YES
0
view save

Test 27

Group: 4

Verdict:

input
5 5
5 4 3 2 1
view save

correct output
YES
1
1
view save

user output
YES
0
view save

Test 28

Group: 4

Verdict:

input
500 5
145 26 285 154 147 314 141 40 ...
view save

correct output
YES
13786
216 220 224 228 232 236 240 24...
view save

user output
YES
0
view save

Test 29

Group: 4

Verdict:

input
500 5
137 22 399 292 249 6 51 224 42...
view save

correct output
YES
13465
456 460 464 468 472 476 480 48...
view save

user output
YES
0
view save

Test 30

Group: 4

Verdict:

input
500 5
153 52 85 100 329 60 433 468 4...
view save

correct output
YES
13642
377 378 377 380 384 388 392 39...
view save

user output
YES
0
view save

Test 31

Group: 4

Verdict:

input
500 5
267 326 95 108 189 32 291 366 ...
view save

correct output
YES
14639
213 214 213 216 220 224 228 23...
view save

user output
YES
0
view save

Test 32

Group: 4

Verdict:

input
500 5
15 450 272 80 321 101 247 438 ...
view save

correct output
NO
view save

user output
YES
0
view save

Test 33

Group: 4

Verdict:

input
499 5
497 498 499 496 495 494 493 49...
view save

correct output
YES
30886
3 7 11 15 19 23 27 31 35 39 43...
view save

user output
YES
0
view save

Test 34

Group: 4

Verdict:

input
500 5
499 500 497 498 495 496 493 49...
view save

correct output
YES
30919
1 4 8 12 16 20 24 28 32 36 40 ...
view save

user output
YES
0
view save

Tasks

A Lumimyrsky-B Monistus-C Laskettelukeskus-D Uolevin kalansaalis-E Käännöt-F Säähavainnot-

Submissions (cppbetter)

2023-11-01 19:17:36 1002023-11-01 18:58:05 652023-11-01 18:54:02 322023-11-01 01:47:42 322023-11-01 01:35:41 322023-11-01 01:15:03 322023-11-01 01:14:26 02023-11-01 00:06:16 322023-11-01 00:01:32 322023-10-31 23:27:57 32