How to print very large Fibonacci numbers eg fib(1000). My approach: When any one of fib(i-1) or fib(i-2) has more than 12 or 13 digits, partition them into groups of 4 digits and put them in a linked list. fib(i-1) is put in list1, fib(i-2) in list2. Perform the addition of these long numbers and overwrite in list2. Now to find next fib list1 is taken as fib(i-2) and list2 as fib(i-1) and this repeats until we approach the given number and finally the result is in list2. As the number of digits goes on increasing, the list is constructed dynamically.
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