Submission #102713

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
102713	2019-03-27 08:08:27	wxh010910	Sorting (IOI15_sorting)	C++17	100 / 100	224 ms	18760 KiB

sorting

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#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
  vector<bool> visit(N);
  vector<int> after(N);
  auto check = [&](int mid) {
    for (int i = 0; i < N; ++i) {
      after[i] = S[i];
      visit[i] = false;
    }
    for (int i = 0; i < mid; ++i) {
      swap(after[X[i]], after[Y[i]]);
    }
    int ans = 0;
    for (int i = 0; i < N; ++i) {
      if (!visit[i]) {
        for (int j = i; ; j = after[j]) {
          visit[j] = true;
          if (!visit[after[j]]) {
            P[ans] = i;
            Q[ans] = after[j];
            ++ans;
          } else {
            break;
          }
        }
      }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:6:39: warning: unused parameter 'M' [-Wunused-parameter]
 int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
                                       ^

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