InterviewBit Problems   Max Min : Unsolved

About the Max Min : Unsolved category (1)
Using c++ stl we can get max and min in 0(1) (5)
Can somebody explain this? (3)
Easiest solution without using any library function (1)
It works for me... ;0 (1)
1 line code in python (5)
Java one-liner using Collections (1)
Very Very Very east solution C++ (1)
My simple approach to this problem (1)
Easy java solution using collection (1)
I have done this but runtime error (1)
C++ 1 line using vector library (1)
With n number of comparision (2)
What could be the space and time complexity for this? (2)
Simple O(n) solution to the given problem (2)
Simple o(n) sol in 2 line (1)
Simple O(nlogn) (2)