Problem:
MathJax.Hub.Config({ tex2jax: { inlineMath: [["$","$"], ["\\(","\\)"]], processEscapes: true }});

Fibonacci Number

Write a program which prints $n$-th fibonacci number for a given integer $n$. The $n$-th fibonacci number is defined by the following recursive formula:

\begin{equation*}
fib(n)= \left \{
\begin{array}{ll}
1　 & (n = 0) \\
1　 & (n = 1) \\
fib(n - 1) + fib(n - 2) & \\
\end{array}
\right.
\end{equation*}

Input

An integer $n$ is given.

output

Print the $n$-th fibonacci number in a line.

Constraints

$0 \leq n \leq 44$

Sample Input 1

3

Sample Output 1

3

Solution in JAVA (judge verdict: Accepted)

import java.util.*;
class Main{
    public static void main(String[] args){
	Scanner read = new Scanner(System.in);
	int[] fibo = new int[50];
	//make fibo
	fibo[0]=1;
	fibo[1]=1;
	for(int i=2; i<50; i++)fibo[i]=fibo[i-1]+fibo[i-2];

	while(read.hasNext()){
	    System.out.println(fibo[read.nextInt()]);
	}

    }
}