CF281B Nearest Fraction

You are given three positive integers $ x,y,n $ . Your task is to find the nearest fraction to fraction  whose denominator is no more than $ n $ . Formally, you should find such pair of integers $ a,b $ $ (1

A single line contains three integers $ x,y,n $ $ (1

Print the required fraction in the format " $ a $ / $ b $ " (without quotes).