Submission #66427

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
66427	2018-08-10 14:17:17	Hoget157	Sorting (IOI15_sorting)	C++14	100 / 100	270 ms	12636 KiB

sorting

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#include <bits/stdc++.h>
#define pb push_back
using namespace std;
int n,*a,m,*x,*y,r;
bool C(int k){
  int p[200000],ans = 0;
  bool used[200000] = {};
  for(int i = 0;i < n;i++) p[i] = a[i];
  for(int i = 0;i < k;i++) swap(p[x[i]],p[y[i]]);
  for(int i = 0;i < n;i++){
    if(!used[i]){
      int pos = i;
      while(!used[pos]){
        ans++;
        used[pos] = true;
        pos = p[pos];
      }
      ans--;
    }
  }
  return ans <= k;
}
typedef pair<int,int> pii;
int b[200000];
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
 
 
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Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:57:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(i < vec.size()){
      ~~^~~~~~~~~~~~
sorting.cpp:41:7: warning: unused variable 'used' [-Wunused-variable]
  bool used[200000] = {};
       ^~~~

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