Submission #117757

#	Time	Username	Problem	Language	Result	Execution time	Memory
117757		zubec	Sorting (IOI15_sorting)	C++14	0 / 100	2 ms	384 KiB

sorting

#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;

int pos[200100];

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {

    int ans = 0;

    for (int i = 0; i < N; i++){
        pos[S[i]] = i;
    }
    for (int i = 0; i < N; i++){
        if (S[i] != i){
            int x = pos[i];
            //cout << "kek " << i << ' ' << x << endl;
            /*pos[S[x]] = x;
            pos[i] = i;*/
            swap(pos[i], pos[S[x]]);
            swap(S[i], S[x]);
            P[ans] = i;
            Q[ans] = x;
            ++ans;
        }
    }
    return ans;

}

/**

5
3 0 4 2 1
5
1 1
4 0
2 3
1 4
0 4


*/

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:7:39: warning: unused parameter 'M' [-Wunused-parameter]
 int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
                                       ^
sorting.cpp:7:48: warning: unused parameter 'X' [-Wunused-parameter]
 int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
                                                ^
sorting.cpp:7:57: warning: unused parameter 'Y' [-Wunused-parameter]
 int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
                                                         ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26