I get a lot of tips that i should see top coders/programmers code just to get some new information.Indeed,I get a lot of new information but I dont understand some specific part of their code,like how's that working.Is there any way to know that? As an example,look at this code:
int n;
cin>>n;
string s;
cin>>s;
int count[26]{0};
for(int i=0;i<n;i++)
count[s[i]-'a']=1; //here i dont get the logic behind this part.I know what its doing.But i dont know how it is doing it.
At first, you should try to understand what each variable means and it would give you some idea.
Dry run tough test case on a piece of paper.