A random question

#1

suppose there is a vector whose size is 0. So if we write cout<<ans.size()-1 does it not output -1?

#2

@meadri17, that’s an interesting question , but it does return -1, but not in the way you would expect, i am sure you might have done cout<<ans.size() -1<<endl; you might got some crazy output but there is no problem with the output , actually what happens is vector.size() return a unsigned number and you might know that unsigned integers only store positive numbers,so what happens is - operator gets overloaded and returns a unsigned number, so that crazy number is an attempt of your computer to have -1 as a unsigned integer which is a garbage value
you can test it by doing

unsigned int size=0;
cout<<size-1<<endl;

it will return the same crazy number as above
so what you need to do is print like this:-
cout<<(int)(ans.size())-1<<endl;
here you have typecasted ans.size() to a signed integer and - operator will then return a signed integer as output as -1 can be represented in signed

#3

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