Easy clean code | Approach explained | c++| backtracking

programming
amazon
interview-questions
facebook
Tags: #<Tag:0x00007f24270c0ec0> #<Tag:0x00007f24270c03a8> #<Tag:0x00007f24270c00d8> #<Tag:0x00007f24270c7ea0>

#1

Backtracking basics question approach explanation here with code:

and for more interview questions visit here: