[백준] 1699번 : 제곱수의 합 - C#

https://www.acmicpc.net/problem/1699

using System;

class Program
{
    static void Main() {
        string s=Console.ReadLine();
        int n=int.Parse(s);
        int[] arr=new int[n+1];
        for(int i=0;i<=n;i++) arr[i]=i;
        for(int i=1;i<=n;i++){
            for(int j=1;j*j<=i;j++){
                if(arr[i]>arr[i-j*j]+1){
                    arr[i]=arr[i-j*j]+1;
                }
            }
        }
        Console.Write(arr[n]);
    }
}