A permutation, also called an “arrangement number” or “order,” is a rearrangement of the elements of an ordered list into a one-to-one correspondence sequence.
ORDER is important !! You should display it in dictionary order.(also known as lexical order, alphabetical order or lexicographic(al) product)
Please solve it by "recursion" or "loop".
No point if you use C++ STL !!!!
ex. N=c,
a b c
a c b
b a c
b c a
c a b
c b a
N
N is a alpahbet. N could be a,b,c,d,e,f.
S_1
S_2
.
.
.
S_?
You need to change line even in the last line.