InterviewBit Problems   Find Nth Fibonacci : Solved

About the Find Nth Fibonacci : Solved category (1)
Increase score of Problem to atleast 400 it is not an easy concept (2)
Can anyone explain, Why we can not use golden ratio, when it works in other compiler but not here? (2)
Python, Why it is giving TLE? (1)
C++ using matrix {1,1,1,0} (1)
This is giving run time error but i dont understand why please help :/ (2)
Java Solution using approach given in first hint (1)
Simple O(logn) c++ solution (1)