Submission #259143

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
259143	2020-08-07 08:48:57	IOrtroiii	Sorting (IOI15_sorting)	C++14	20 / 100	1 ms	384 KiB

sorting

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#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[]) {
   int ans = 0;
   vector<int> invp(N);
   for (int i = 0; i < N; ++i) invp[S[i]] = i;
   for (int i = 0; i < N; ++i) {
      if (S[i] == i) continue;
      int j = invp[i];
      P[ans] = i;
      Q[ans++] = j;
      swap(S[i], S[j]);
      invp[S[i]] = i;
      invp[S[j]] = j;
   }
   return ans;
   /*
   auto solve = [&](int mid) -> bool {
      vector<int> perm(N);
      for (int i = 0; i < N; ++i) {
         perm[i] = S[i];
      }
      for (int i = 0; i < mid; ++i) swap(perm[X[i]], perm[Y[i]]);
      vector<int> invp(N);
      for (int i = 0; i < N; ++i) invp[perm[i]] = i;
      int ans = 0;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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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: 8 / 8
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26