MLE求条(回复有用必关)

#include<bits/stdc++.h>
using namespace std;
#define dou double
dou f(dou x,int n){
    if(n==1)return x/(1+x);
    else return n+f(x,f(x,n-1));
}
int main(){
    double x;
    int n;
    cin>>x>>n;
    printf("%.2lf",f(x,n));
    return 0;
}