u guys said i need to train,so i train.but i cant do this.thus,help me out.
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u guys said i need to train,so i train.but i cant do this.thus,help me out.
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You should at least try to explain your solution method, so that we don't need to look at the code and try to understand it.
Also, something like
s.erase(s.begin()+i);
is $$$O(N)$$$ worst case. Instead, keep another stringt
and add the character tot
where you don't erase it ins
(because adding a char to the end of a string is $$$O(1)$$$ amortized).So instead of this:
Do this:
and then use
t
instead ofs
.