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Submission #127967

# Submission time Handle Problem Language Result Execution time Memory
127967 2019-07-10T09:32:11 Z DodgeBallMan Sorting (IOI15_sorting) C++14
100 / 100
 384 ms 27752 KB 
#include <bits/stdc++.h>
#include "sorting.h"
#define pii pair<int, int>
#define x first
#define y second 

using namespace std;

const int NN = 2e5 + 10;
const int MM = 6e5 + 10;

int n, m, s[NN], x[MM], y[MM];

vector<pii> chk( int mid ) {
    int pos[NN], te[NN];
    vector<pii> ret;
    for( int i = 0 ; i < n ; i++ ) te[i] = s[i];
    for( int i = 0 ; i < mid ; i++ ) swap( te[x[i]], te[y[i]] );
    for( int i = 0 ; i < n ; i++ ) pos[te[i]] = i;
    for( int i = 0 ; i < n ; i++ ) if( te[i] != i ) {
        ret.emplace_back( pii( te[i], i ) );
        int now = te[i];
        swap( te[i], te[pos[i]] );
        swap( pos[now], pos[i] );
    }
    return ret;
}

int findSwapPairs( int N, int S[], int M, int X[], int Y[], int p[], int q[] ) {
    int pos[NN];
    n = N, m = M;
    for( int i = 0 ; i < n ; i++ ) s[i] = S[i];
    for( int i = 0 ; i < m ; i++ ) x[i] = X[i], y[i] = Y[i];
    int l = 0, r = m;
    while( l < r ) {
        int mid = ( l + r ) >> 1;
        if( chk( mid ).size() <= mid ) r = mid;
        else l = mid + 1;
    } 
    vector<pii> ans = chk( l );
    for( int i = 0 ; i < n ; i++ ) pos[s[i]] = i;
    for( int i = 0 ; i < r ; i++ ) {
        swap( pos[s[x[i]]], pos[s[y[i]]] );
        swap( s[x[i]], s[y[i]] );
        if( i < ans.size() ) {
            int a = ans[i].x, b = ans[i].y;
            p[i] = pos[a], q[i] = pos[b];
            swap( s[pos[a]], s[pos[b]] );
            swap( pos[a], pos[b] );
        } 
    }
    for( int i = ans.size() ; i < r ; i++ ) p[i] = 0, q[i] = 0;
    return l;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if( chk( mid ).size() <= mid ) r = mid;
             ~~~~~~~~~~~~~~~~~~^~~~~~
sorting.cpp:45:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if( i < ans.size() ) {
             ~~^~~~~~~~~~~~
sorting.cpp:52:26: warning: conversion to 'int' from 'std::vector<std::pair<int, int> >::size_type {aka long unsigned int}' may alter its value [-Wconversion]
     for( int i = ans.size() ; i < r ; i++ ) p[i] = 0, q[i] = 0;
                  ~~~~~~~~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 380 KB Output is correct
7 Correct 2 ms 376 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 380 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 0 ms 508 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 380 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 0 ms 508 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 3 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 380 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 3 ms 760 KB Output is correct
22 Correct 3 ms 760 KB Output is correct
23 Correct 4 ms 760 KB Output is correct
24 Correct 3 ms 760 KB Output is correct
25 Correct 3 ms 760 KB Output is correct
26 Correct 3 ms 760 KB Output is correct
27 Correct 3 ms 764 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 632 KB Output is correct
3 Correct 3 ms 636 KB Output is correct
4 Correct 3 ms 632 KB Output is correct
5 Correct 3 ms 632 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 4 ms 632 KB Output is correct
11 Correct 4 ms 632 KB Output is correct
12 Correct 4 ms 632 KB Output is correct
13 Correct 4 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 632 KB Output is correct
3 Correct 3 ms 636 KB Output is correct
4 Correct 3 ms 632 KB Output is correct
5 Correct 3 ms 632 KB Output is correct
6 Correct 3 ms 632 KB Output is correct
7 Correct 3 ms 632 KB Output is correct
8 Correct 4 ms 632 KB Output is correct
9 Correct 3 ms 632 KB Output is correct
10 Correct 4 ms 632 KB Output is correct
11 Correct 4 ms 632 KB Output is correct
12 Correct 4 ms 632 KB Output is correct
13 Correct 4 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 207 ms 24572 KB Output is correct
16 Correct 217 ms 25296 KB Output is correct
17 Correct 246 ms 26380 KB Output is correct
18 Correct 87 ms 23056 KB Output is correct
19 Correct 156 ms 25708 KB Output is correct
20 Correct 160 ms 26556 KB Output is correct
21 Correct 162 ms 26544 KB Output is correct
22 Correct 199 ms 21844 KB Output is correct
23 Correct 281 ms 27436 KB Output is correct
24 Correct 295 ms 26988 KB Output is correct
25 Correct 255 ms 26676 KB Output is correct
26 Correct 170 ms 25084 KB Output is correct
27 Correct 160 ms 24368 KB Output is correct
28 Correct 384 ms 26968 KB Output is correct
29 Correct 223 ms 26300 KB Output is correct
30 Correct 127 ms 23460 KB Output is correct
31 Correct 228 ms 26844 KB Output is correct
32 Correct 222 ms 26548 KB Output is correct
33 Correct 246 ms 26884 KB Output is correct
34 Correct 232 ms 26900 KB Output is correct
35 Correct 159 ms 25500 KB Output is correct
36 Correct 68 ms 22136 KB Output is correct
37 Correct 258 ms 27752 KB Output is correct
38 Correct 249 ms 26672 KB Output is correct
39 Correct 251 ms 26756 KB Output is correct