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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4. 	int n, k;
  5. 	cin >> n >> k;
  6. 	vector<int> perm(n), pos(n+1, 0);
  7. 	for (int i = 0; i < n; i++) {
  8. 		cin >> perm[i];
  9. 		pos[perm[i]] = i + 1;
  10. 	}
  11. 	/*for (int i = 0; i <= n; i++) {
  12. 		cout << pos[i] << " ";
  13. 	}*/
  14. 	//max -> pos,,, i -> perm
  15. 	for (int max = n, i = 0, swaps = 0; max > 0 && i < n && swaps < k; max--, i++) {
  16. 		int maxpos = pos[max];
  17. 		if (perm[i] != max) {
  18. 			swap(perm[i], perm[maxpos - 1]);
  19. 			pos[max] = i + 1;
  20. 			pos[perm[maxpos - 1]] = maxpos;
  21. 			swaps++;
  22. 		}
  23. 	}
  24. 	for (int i = 0; i < n; i++) {
  25. 		cout << perm[i] << " ";
  26. 	}
  27. 	return 0;
  28. }
Success #stdin #stdout 0.05s 3544KB
comments (?)
stdin 
5 2
1 2 3 4 5
stdout 
5 4 3 2 1
https://ideone.com/a02qyk
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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