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  1. #include<iostream>
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int n,ok;
  6. string a[10];
  7. void khoitao(){
  8. 	cin>>n;
  9. 	for(int i=1;i<=n;i++) a[i]=i+64;
  10. 	ok=0;
  11. }
  12. void in(){
  13. 	for(int i=1;i<=n;i++) cout<<a[i];
  14. 	cout<<' ';
  15. }
  16. void sinh(){
  17. 	int d=n-1;
  18. 	while(d>0&&a[d]>a[d+1]) d--;
  19. 	if(d==0) {
  20. 		ok=1;
  21. 	}else{
  22. 		int j=n;
  23. 		while(a[j]<a[d]) j--;
  24. 		swap(a[j],a[d]);
  25. 		int l=d+1,r=n;
  26. 		while(l<r){
  27. 			swap(a[l],a[r]);
  28. 			l++;r--;
  29. 		}
  30. 	}
  31. }
  32. void xuli(){
  33. 	khoitao();
  34. 	while(ok==0){
  35. 		in();
  36. 		sinh();
  37. 	}
  38. }
  39. int main(){
  40. 	int t;cin>>t;
  41. 	while(t--){
  42. 		xuli();
  43. 		cout<<endl;
  44. 	}
  45. }
Success #stdin #stdout 0.01s 5444KB
comments (?)
stdin
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2
2
4
stdout
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AB BA 
ABCD ABDC ACBD ACDB ADBC ADCB BACD BADC BCAD BCDA BDAC BDCA CABD CADB CBAD CBDA CDAB CDBA DABC DACB DBAC DBCA DCAB DCBA
https://ideone.com/yQiVgf
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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