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  1. #include <bits/stdc++.h>
  2. #include "messy.h"
  3. using namespace std;
  4.  
  5. void find_writes(string s0, vector<int> Bq) {
  6. 	int n =s0.length(), q =Bq.size();
  7. 	if(q == 1) return;
  8. 	for(int i =0; i < q/2; i++) {
  9. 		string s =s0;
  10. 		s[Bq[i]] ='1';
  11. 		add_element(s);}
  12. 	string s1 =s0, s2 =s0;
  13. 	vector<int> Bq1,Bq2;
  14. 	for(int i =0; i < q/2; i++) {
  15. 		s1[Bq[i]] ='1';
  16. 		Bq2.push_back(Bq[i]);}
  17. 	for(int i =0; i < q/2; i++) {
  18. 		s2[Bq[q/2+i]] ='1';
  19. 		Bq1.push_back(Bq[q/2+i]);}
  20. 	find_writes(s1,Bq1);
  21. 	find_writes(s2,Bq2);}
  22.  
  23. void find_perm(string s0, vector<int> Bq, vector<int> Bres, vector<int> &P) {
  24. 	int n =s0.length(), q =Bq.size();
  25. /*	for(int i =0; i < q; i++) cout << Bq[i] << " ";
  26. 	cout << "\n";
  27. 	for(int i =0; i < q; i++) cout << Bres[i] << " ";
  28. 	cout << ".\n";
  29. */	if(q == 2) {
  30. 		string s =s0;
  31. 		s[Bres[0]] ='1';
  32. 		if(check_element(s)) {
  33. 			P[Bres[0]] =Bq[0];
  34. 			P[Bres[1]] =Bq[1];}
  35. 		else {
  36. 			P[Bres[0]] =Bq[1];
  37. 			P[Bres[1]] =Bq[0];}
  38. 		return;}
  39. 	vector<int> Bres1,Bres2;
  40. 	for(int i =0; i < q; i++) {
  41. 		string s =s0;
  42. 		s[Bres[i]] ='1';
  43. 		if(check_element(s)) Bres1.push_back(Bres[i]);
  44. 		else Bres2.push_back(Bres[i]);}
  45. 	vector<int> Bq1,Bq2;
  46. 	string s1 =s0, s2 =s0;
  47. 	for(int i =0; i < q/2; i++) Bq2.push_back(Bq[q/2+i]);
  48. 	for(int i =0; i < q/2; i++) Bq1.push_back(Bq[i]);
  49. 	for(int i =0; i < q/2; i++) s2[Bres1[i]] =s1[Bres2[i]] ='1';
  50. 	find_perm(s1,Bq1,Bres1,P);
  51. 	find_perm(s2,Bq2,Bres2,P);}
  52.  
  53. vector<int> restore_permutation(int n, int w, int r) {
  54. 	int b =0;
  55. 	while((1<<b) != n) b++;
  56.  
  57. 	vector<int> Bq;
  58. 	string s0;
  59. 	for(int i =0; i < n; i++) {
  60. 		Bq.push_back(i);
  61. 		s0 +="0";}
  62. 	find_writes(s0,Bq);
  63.  
  64.     compile_set();
  65.  
  66.     vector<int> P(n);
  67.     find_perm(s0,Bq,Bq,P);
  68.  
  69.     return P;}
  70.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:2:19: fatal error: messy.h: No such file or directory
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/CwyzEx
IOI 2016 messy
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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