E

#include "iostream"
#include "utility"
#include "algorithm"
#include "set"
#include "vector"
#include "map"
#include "iterator"
#include "functional"
#include "sstream"
#include "iomanip"
#include "deque"
#include "stack"
#include "cstring"

#define ll long long
#define REP(i,n) for(ll i=0;i<n;i++)
#define IREP(in,i,n) for(ll i=in;i<n;i++)

#define dbg(msg) //cout << msg << endl;
#define var(n,x) //cout << n << " = " << x << endl;

using namespace std;

int f91(int n){
	if(n<101){
		return f91(f91(n+11));
	}
	if(n>100){
		return n-10;
	}
}

int main(int argv, char** argc){

	int n;
	while(cin >> n){
		if(!n) break;
		cout << "f91(" << n << ")  =  " << f91(n) << endl;
	}

  	return 0;
}