So any string with two same characters is not valid??
for example :
GEEK has E followed by E.
So GEEK is also invalid?
On Jun 3, 1:49 pm, Hassan Monfared <hmonfa...@gmail.com> wrote:
> bool IsValid(string s)
> {
> for(int len=0;len<s.len/2;len++)
> {
> int start1=0,start2=len+1;
> while(start2<s.size())
> {
> for(int i=0;i<len && start2+i<s.size() &&
> s[start1+i]=s[start2+i];i++);
> if(i==len)
> return false; //"not valid"
> start1++;
> start2++;
> }
> }
> return true; // valid
>
>
>
>
>
>
>
> }
> On Sun, Jun 3, 2012 at 12:52 PM, atul anand <atul.87fri...@gmail.com> wrote:
> > can be done with O(n^2) time complexity..
>
> > can it be done with O(n) complexity ???
>
> > On 6/3/12, utsav sharma <utsav.sharm...@gmail.com> wrote:
> > > given a string tell wether it is valid or not.
> > > string is valid if there is no substring which have the same substring
> > > following it.
>
> > > these strings are not valid:- "stringstring","geek123123rt",
> > > "abcadabcad","strngstingstrngsting"
>
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