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Problem
Given a non-negative integer N, print the Nth Fibonacci number using recursion. F(0)=0, F(1)=1
Input format
Input
input.txt
- A single integer N (0 ≤ N ≤ 20)
Output format
Output
output.txt
- The Nth Fibonacci number
Example
input
7
output
13
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Sample cases (from the problem)
Sample Case 1
Input
7
Expected output
13
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