Submission #599434

#	Time	Username	Problem	Language	Result	Execution time	Memory
599434		PiejanVDC	Sorting (IOI15_sorting)	C++17	0 / 100	1 ms	340 KiB

sorting

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

int findSwapPairs(int n, int s[], int m, int X[], int Y[], int P[], int Q[]) {
    vector<int>v(n);
    for(int i = 0 ; i < n ; i++)
        v[s[i]] = i;

    auto sorted = [&] () -> bool {
        for(int i = 0 ; i < n ; i++)
            if(s[i] != i)
                return 0;
        return 1;
    };

    int cnt = 0;
    for(int i = 2 ; i < n ; i++) {
        if(sorted())
            return cnt;
        cnt++;
        P[cnt] = i, Q[cnt] = v[i];
        swap(v[i], v[s[i]]);
        swap(s[i], s[v[s[i]]]);
        swap(v[s[0]], v[s[1]]);
        swap(s[0], s[1]);
    }
    if(!sorted())
        cnt++, P[cnt] = 0, Q[cnt] = 1;
    return cnt;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:5:39: warning: unused parameter 'm' [-Wunused-parameter]
    5 | int findSwapPairs(int n, int s[], int m, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:5:46: warning: unused parameter 'X' [-Wunused-parameter]
    5 | int findSwapPairs(int n, int s[], int m, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:5:55: warning: unused parameter 'Y' [-Wunused-parameter]
    5 | 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