oj.uz

Submission #624159

# Submission time Handle Problem Language Result Execution time Memory
624159 2022-08-07T10:43:10 Z mdn2002 Sorting (IOI15_sorting) C++14
74 / 100
 1000 ms 33112 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] ] ] );
    }
    set < int > s;
    for ( int i = 1 ; i <= n ; i ++ )
    {
        if ( dis [i] != a [i] ) s . insert ( 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 ] ] ] );

        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] ) );

        }
    }
    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:60:73: warning: declaration of 'Q' shadows a global declaration [-Wshadow]
   60 | 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:60:64: warning: declaration of 'P' shadows a global declaration [-Wshadow]
   60 | 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:122:17: warning: declaration of 'x' shadows a global declaration [-Wshadow]
  122 |             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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 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 0 ms 340 KB Output is correct
2 Correct 0 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 1 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 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 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 0 ms 340 KB Output is correct
14 Correct 0 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 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 3 ms 596 KB Output is correct
22 Correct 2 ms 596 KB Output is correct
23 Correct 3 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 2 ms 596 KB Output is correct
27 Correct 2 ms 616 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Correct 6 ms 596 KB Output is correct
3 Correct 5 ms 596 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 592 KB Output is correct
6 Correct 3 ms 468 KB Output is correct
7 Correct 5 ms 608 KB Output is correct
8 Correct 7 ms 596 KB Output is correct
9 Correct 5 ms 596 KB Output is correct
10 Correct 6 ms 596 KB Output is correct
11 Correct 8 ms 596 KB Output is correct
12 Correct 4 ms 596 KB Output is correct
13 Correct 6 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 596 KB Output is correct
2 Correct 6 ms 596 KB Output is correct
3 Correct 5 ms 596 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 592 KB Output is correct
6 Correct 3 ms 468 KB Output is correct
7 Correct 5 ms 608 KB Output is correct
8 Correct 7 ms 596 KB Output is correct
9 Correct 5 ms 596 KB Output is correct
10 Correct 6 ms 596 KB Output is correct
11 Correct 8 ms 596 KB Output is correct
12 Correct 4 ms 596 KB Output is correct
13 Correct 6 ms 596 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 870 ms 24788 KB Output is correct
16 Correct 865 ms 33112 KB Output is correct
17 Execution timed out 1047 ms 30976 KB Time limit exceeded
18 Halted 0 ms 0 KB -