Write code to remove the duplicate characters in a string
without using any additional buffer NOTE: One or two additional variables are fine
An extra copy of the array is not.
This question is from the book “cracking thecoding interview”.
Time complexity= O(n^2)
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//www.GauravVichare.com #include<stdio.h> #include<string.h> void dup(char a[]); void main() { int i; char a[30]; printf("Enter string:"); scanf("%s",a); dup(a); printf("%s",a); } void dup(char a[]) { int i,j,n,flag,k; char temp; n=strlen(a); for(i=0;i<n;i++) { for(j=k=i+1;k<=n;) { if(a[i]!=a[k]) { a[j]=a[k]; j++; k++; } else { k++; } } }//www.GauravVichare.com } |
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Recursive insertion sort
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