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 C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Fibonacci_Number
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            int temp1 = 1;
            int temp2 = 1;
            int temp3 = 0;
            List<int> fibs = new List<int>();
            fibs.Add(1);
            fibs.Add(1);

            for (int i = 2; i <= 44; ++i)
            {
                temp3 = temp1 + temp2;
                fibs.Add(temp3);
                temp1 = temp2;
                temp2 = temp3;

            }

            Console.WriteLine(fibs[n]);




        }
    }
}