oj.uz

Submission #624160

# Submission time Handle Problem Language Result Execution time Memory
624160 2022-08-07T10:59:23 Z mdn2002 Sorting (IOI15_sorting) C++14
100 / 100
 539 ms 36884 KB 
#include "sorting.h"
#include<bits/stdc++.h>
using namespace std;

int n , m , a [200005] , aa [200005] , x [600005] , y [600005] , dis [200005] , wrdis [200005] , wra [200005] , P [600005] , Q [600005];


bool ck ( int xx )
{
    for ( int i = 1 ; i <= n ; i ++ )
    {
        a [i] = aa [i];
        wra [ a [i] ] = i;
    }
    int mm = xx;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        dis [i] = i;
        wrdis [ dis [i] ] = i;
    }
    for ( int j = mm - 1 ; j >= 0 ; j -- )
    {
        swap ( dis [ x [j] ] , dis [ y [j] ] );
        swap ( wrdis [ dis [ x [j] ] ] , wrdis [ dis [ y [j] ] ] );
    }
    deque < int > s;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        if ( dis [i] != a [i] ) s . push_back ( dis [i] );
    }

    for ( int i = 1 ; i <= mm ; i ++ )
    {

        swap ( a [ x [ i - 1 ] ] , a [ y [ i - 1 ] ] );
        swap ( wra [ a [ x [ i - 1 ] ] ] , wra [ a [ y [ i - 1 ] ] ] );
        swap ( dis [ x [ i - 1 ] ] , dis [ y [ i - 1 ] ] );
        swap ( wrdis [ dis [ x [ i - 1 ] ] ] , wrdis [ dis [ y [ i - 1 ] ] ] );

        while ( s . size () )
        {

            int x = * s . begin () , z = wra [x];
            s . pop_front ();
            if ( dis [ wrdis [x] ] == a [ wrdis [x] ] ) continue;

            swap ( a [ wrdis [x] ] , a [z] );
            swap ( wra [ a [ wrdis [x] ] ] , wra [ a [z] ] );
            break;

        }
    }
    int f = 0;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        if ( a [i] != i ) f = 1;
    }
    if ( f == 0 ) return 1;
    return 0;
}
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {

    n = N;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        a [i] = S [ i - 1 ];
        a [i] ++;
        aa [i] = a [i];
    }
    m = M;
    for ( int i = 0 ; i < m ; i ++ )
    {
        x [i] = X [i] , y [i] = Y [i];
        x [i] ++ , y [i] ++;
    }

    int l = 0 , rr = m + 1 , mid;
    while ( l < rr )
    {
        mid = ( l + rr ) / 2;
        if ( ck ( mid ) ) rr = mid;
        else l = mid + 1;
    }
    m = l;

    for ( int i = 1 ; i <= n ; i ++ )
    {
        a [i] = aa [i];
        wra [ a [i] ] = i;
    }
    for ( int i = 1 ; i <= n ; i ++ )
    {
        dis [i] = i;
        wrdis [i] = i;
    }
    for ( int j = m - 1 ; j >= 0 ; j -- )
    {
        swap ( dis [ x [j] ] , dis [ y [j] ] );
        swap ( wrdis [ dis [ x [j] ] ] , wrdis [ dis [ y [j] ] ] );
    }

    set < int > s;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        if ( dis [i] != a [i] ) s . insert ( dis [i] );
    }

    int r = 0;
    for ( int i = 1 ; i <= m ; i ++ )
    {

        swap ( a [ x [ i - 1 ] ] , a [ y [ i - 1 ] ] );
        swap ( wra [ a [ x [ i - 1 ] ] ] , wra [ a [ y [ i - 1 ] ] ] );
        swap ( dis [ x [ i - 1 ] ] , dis [ y [ i - 1 ] ] );
        swap ( wrdis [ dis [ x [ i - 1 ] ] ] , wrdis [ dis [ y [ i - 1 ] ] ] );



        P [ i - 1 ] = -1 , Q [ i - 1 ] = -1;
        if ( s . size () )
        {

            int x = * s . begin () , z = wra [x];
            s . erase ( s . begin () );

            swap ( a [ wrdis [x] ] , a [z] );
            swap ( wra [ a [ wrdis [x] ] ] , wra [ a [z] ] );
            if ( a [z] == dis [z] ) s . erase ( s . lower_bound ( dis [z] ) );

            P [ i - 1 ] = wrdis [x] - 1 , Q [ i - 1 ] = z - 1;
            r ++;

        }

        if ( P [ i - 1 ] == -1 )
        {
            P [ i - 1 ] = 0;
            Q [ i - 1 ] = 0;
            r ++;
        }

    }
    return r;
}

Compilation message

sorting.cpp: In function 'bool ck(int)':
sorting.cpp:43:17: warning: declaration of 'x' shadows a global declaration [-Wshadow]
   43 |             int x = * s . begin () , z = wra [x];
      |                 ^
sorting.cpp:5:40: note: shadowed declaration is here
    5 | int n , m , a [200005] , aa [200005] , x [600005] , y [600005] , dis [200005] , wrdis [200005] , wra [200005] , P [600005] , Q [600005];
      |                                        ^
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:61:73: warning: declaration of 'Q' shadows a global declaration [-Wshadow]
   61 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                                     ~~~~^~~
sorting.cpp:5:126: note: shadowed declaration is here
    5 | int n , m , a [200005] , aa [200005] , x [600005] , y [600005] , dis [200005] , wrdis [200005] , wra [200005] , P [600005] , Q [600005];
      |                                                                                                                              ^
sorting.cpp:61:64: warning: declaration of 'P' shadows a global declaration [-Wshadow]
   61 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                            ~~~~^~~
sorting.cpp:5:113: note: shadowed declaration is here
    5 | int n , m , a [200005] , aa [200005] , x [600005] , y [600005] , dis [200005] , wrdis [200005] , wra [200005] , P [600005] , Q [600005];
      |                                                                                                                 ^
sorting.cpp:123:17: warning: declaration of 'x' shadows a global declaration [-Wshadow]
  123 |             int x = * s . begin () , z = wra [x];
      |                 ^
sorting.cpp:5:40: note: shadowed declaration is here
    5 | int n , m , a [200005] , aa [200005] , x [600005] , y [600005] , dis [200005] , wrdis [200005] , wra [200005] , P [600005] , Q [600005];
      |                                        ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 264 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 264 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 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 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 264 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 2 ms 596 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 2 ms 596 KB Output is correct
24 Correct 2 ms 596 KB Output is correct
25 Correct 2 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 2 ms 604 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 3 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 1 ms 476 KB Output is correct
5 Correct 2 ms 476 KB Output is correct
6 Correct 2 ms 476 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 6 ms 596 KB Output is correct
10 Correct 3 ms 488 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 3 ms 604 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 1 ms 476 KB Output is correct
5 Correct 2 ms 476 KB Output is correct
6 Correct 2 ms 476 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 6 ms 596 KB Output is correct
10 Correct 3 ms 488 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 301 ms 24776 KB Output is correct
16 Correct 341 ms 25244 KB Output is correct
17 Correct 513 ms 26600 KB Output is correct
18 Correct 117 ms 22024 KB Output is correct
19 Correct 364 ms 30100 KB Output is correct
20 Correct 385 ms 31240 KB Output is correct
21 Correct 348 ms 31316 KB Output is correct
22 Correct 303 ms 30560 KB Output is correct
23 Correct 331 ms 36292 KB Output is correct
24 Correct 539 ms 35748 KB Output is correct
25 Correct 532 ms 35448 KB Output is correct
26 Correct 295 ms 30812 KB Output is correct
27 Correct 271 ms 29136 KB Output is correct
28 Correct 441 ms 35528 KB Output is correct
29 Correct 447 ms 34716 KB Output is correct
30 Correct 258 ms 28584 KB Output is correct
31 Correct 523 ms 35656 KB Output is correct
32 Correct 310 ms 35016 KB Output is correct
33 Correct 504 ms 35832 KB Output is correct
34 Correct 348 ms 35644 KB Output is correct
35 Correct 348 ms 29860 KB Output is correct
36 Correct 72 ms 22924 KB Output is correct
37 Correct 513 ms 36884 KB Output is correct
38 Correct 493 ms 35544 KB Output is correct
39 Correct 484 ms 35616 KB Output is correct