Submission #32168

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
32168	2017-10-01 13:57:30	imeimi2000	Sorting (IOI15_sorting)	C++14	100 / 100	226 ms	14900 KiB

sorting

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#include "sorting.h"
#include <vector>
#include <algorithm>
using namespace std;
typedef long long llong;
int arr[200000];
int x[200000];
int y[200000];
int n, m;
int tmp[200000];
bool ch[200000];
int ps[200000];
int qs[200000];
bool check(int r) {
  int j, cnt = 0;
  for (int i = 0; i < n; ++i) tmp[i] = arr[i], ch[i] = false;
  for (int i = 0; i < r; ++i) swap(tmp[x[i]], tmp[y[i]]);
  for (int i = 0; i < n; ++i) {
    if (ch[i]) continue;
    ch[i] = true;
    j = tmp[i];
    while (j != i) ++cnt, ch[j] = true, j = tmp[j];
  }
  return cnt <= r;
}
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:30:39: 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