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  1.  
  2. #include<bits/stdc++.h>
  3. #define mod              1000000007
  4. #define ll               long long
  5. #define	p(x)             pair<x,x>
  6. #define v(x)             vector<x>
  7. #define tree             node*
  8. #define sz(a)            a.size()
  9. #define f                first
  10. #define s                second
  11. #define pb(a)            push_back(a)
  12. #define pf(a)            push_front(a)
  13. #define FOR(i,l,r)       for(int i=l;i<r;i++)
  14. #define FORX(i,l,r,x)    for(int i=l;i<r;i+=x)
  15. #define FORD(i,l,r)      for(int i=l;i>=r;i--)
  16. #define correct(x,y,n,m) 0<=(x)&&(x)<(n)&&0<=(y)&&(y)<(m)
  17. #define cin(M,n)         FOR(i,0,n)cin>>M[i]
  18. #define cout(M,n)        FOR(i,0,n)cout<<M[i]
  19. #define rs(M,x)          memset(M,x,sizeof(M))
  20. #define reset()          FOR(i, 0, 1001)A[i].clear(),check[i]=false
  21. #define faster()         cin.tie(0); ios_base::sync_with_stdio(false); cout.tie(0);
  22. #define run()            int t; cin >> t; while (t--)
  23. #define pq(x)            priority_queue<x>
  24. #define neg_pq(x)        priority_queue<x, vector<x>, greater<x>>
  25. #define all(M)           M.begin(),M.end()
  26. using namespace std;
  27.  
  28. //_______________________NGUYỄN_NGỌC_TOÀN_______________________//
  29.  
  30. bool check(v(char) M, int n) {
  31. 	FOR(i, 1, n - 1) {
  32. 		if (M[i] == 'A' || M[i] == 'E') {
  33. 			if (M[i - 1] != 'A' && M[i - 1] != 'E' && M[i + 1] != 'A' && M[i + 1] != 'E')return false;
  34. 		}
  35. 	}
  36. 	return true;
  37. }
  38. int main() {
  39. 	char c; cin >> c;
  40. 	v(char) M(c - 'A' + 1);
  41. 	iota(all(M), 'A');
  42. 	do {
  43. 		if (check(M, sz(M))) {
  44. 			cout(M, sz(M));
  45. 			cout << endl;
  46. 		}
  47. 	} while (next_permutation(all(M)));
  48. }
  49.  
  50. //__________________________B20DCPT173__________________________//
  51.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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D
stdout
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ABCD
ABDC
ACBD
ACDB
ADBC
ADCB
BCDA
BDCA
CBDA
CDBA
DBCA
DCBA
https://ideone.com/dBtWyB
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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