[백준] 2193번 : 이친수 - Java(자바)

https://www.acmicpc.net/problem/2193

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner s=new Scanner(System.in);
        int n=s.nextInt();
        long arr[]=new long[n+1];
        arr[1]=1;
        for(int i=2;i<=n;i++){
            arr[i]=arr[i-1]+arr[i-2];
        }
        System.out.print(arr[n]);
    }
}