import java.util.Scanner; //백준 public class Main { static long fibonacci(int before, int sum, int input) { long output=0; if(input>2) { before=sum-before; sum=before+sum; System.out.println("before: "+before + "sum: "+sum); return output=before+fibonacci(before,sum,input-1); }else if(input==2) { return 1; }else if(input==1) { return 1; }else if(input==0) { return 0; } return output; } public sta..