public class Solution {
public int Fibonacci(int n) {
try {
if(n==0){
return 0;
}
if(n==1) {
return 1;
}
else if (n>=2&&n<=39) {
return Fibonacci(n-1)+Fibonacci(n-2);
}
else {
throw new Exception(" 请输入整数");
}
} catch (Exception e) {
e.printStackTrace();
}
return -1;


}