Hi Nishanth Pandey, Excellent solution! It meets all requirements in problem!
One thing I am finding hard to understand is your duplicate functions logic. code is simple. But reason behind it I am finding hard. I would write it like bool duplicate(char str[], int start, int end) { if(start == end) return false; // Without loop if (str[start] == str[end]) /* I would end up generating same permutations for example abcacd here swapping a and a would repeat same permutations. unfortunately this logic is not working well */ return true; return false; } Why are you skipping if you find element you want to swap in between start and end indexes in duplicate function? Please let me know you intuition. -Thanks, Bujji On Tue, Jan 7, 2014 at 6:08 AM, Nishant Pandey <nishant.bits.me...@gmail.com > wrote: > This will help u i guess : > > #include <iostream> > #include <string.h> > using namespace std; > > void swap(char str[],int m,int n ) { > char temp=str[m]; > str[m]=str[n]; > str[n]=temp; > } > bool duplicate(char str[], int start, int end) > { if(start == end) > return false; > else > for(; start<end; start++) > if (str[start] == str[end]) > return true; > return false; > } > void Permute(char str[], int start, int end) > { > if(start >= end){ > cout<<str<<endl; > return; > } > for(int i=start;i<=end;i++) > { if(!duplicate(str,start,i)) > { > swap(str,start,i); > Permute(str,start+1,end); > swap(str,start,i); > } > } > } > > int main() > { > char Str[]="aba"; > Permute(Str,0,strlen(Str)-1); > return 0; > } > > > > NIshant Pandey > Cell : 9911258345 > Voice Mail : +91 124 451 2130 > > > > > On Tue, Jan 7, 2014 at 4:44 PM, kumar raja <rajkumar.cs...@gmail.com>wrote: > >> This u can do it using the backtracking method. To know how to use >> backtracking refer algorithm design manual by steve skiena. >> >> >> On 7 January 2014 03:35, bujji jajala <jajalabu...@gmail.com> wrote: >> >>> generate all possible DISTINCT permutations of a given string with some >>> possible repeated characters. Use as minimal memory as possible. >>> >>> if given string contains n characters in total with m < n distinct >>> characters each occuring n_1, n_2, ....n_m times where n_1 + n_2 + ...+ n_m >>> = n >>> >>> program should generate n! / ( n_1! * n_2! * ....* n_m! ) strings. >>> >>> Ex: >>> aba is given string >>> >>> Output: >>> >>> aab >>> aba >>> baa >>> >>> >>> -Thanks, >>> Bujji >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Algorithm Geeks" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to algogeeks+unsubscr...@googlegroups.com. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to algogeeks+unsubscr...@googlegroups.com. >> > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to algogeeks+unsubscr...@googlegroups.com. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To unsubscribe from this group and stop receiving emails from it, send an email to algogeeks+unsubscr...@googlegroups.com.