package 斐波那契数;
import java.util.Scanner;
class 斐波那契数 {
 public static void main(String[] args) {
 System.out.println("请输入想查询的第几个斐波拉楔数");
 long n = new Scanner(System.in).nextLong();
 System.out.println(f(n));
 }
 private static int f(long n) {
 if(n==1||n==2) {
 return 1;
 }
 return f(n-1)+f(n-2);
 }
 }
 /*
 * 112358
 *  ab
 *  ab
 *   ab 
 * b=a+b;
 * a=b-a;
 */
}