#include <iostream>#include <math.h>using namespace std;int f91 (int in0 ){if (in0 <=100 ){return f91(f91(in0 +11 ) ) ;}else{return in0 -10 ;}}int main(){int n;while(cin>>n){cout<<"f91""("<<n<<")"" = ";n=(n<101)?91:n-10;cout<<n<<endl;}return 0;}