Problem:
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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.*;

public class Main {
	
	private int[] fib = new int [45];
	
	Main() {
		for(int i=0;i<45;i++) {
			if(i<=1)fib[i]=1;
			else fib[i]=fib[i-1]+fib[i-2];
		}
	}
	
	int get(int n) {
		return fib[n];
	}
	
	public static void main(String[] args) {
		System.out.println(new Main().get(new Scanner(System.in).nextInt()));
	}
}