#include<stdio.h>
using namespace std;
int a[1000100], i = 0; //a[10010]会Runtime Error
int f91(int x){
    if(x <= 100)return f91(f91(x+11));
    return x-10;
}
int main(){
    do scanf("%d", &a[i]); while(a[i++] != 0);
    for(int ii = 0; ii < i-1; ii++)printf("f91(%d) = %d\n", a[ii], f91(a[ii]));
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
long long f91(int n)
{
if(n<=100)return f91(f91(n+11));
else return n-10;
}
int a[1000001],i=0;
int main()
{
while(1)
{
cin>>a[++i];
if(a[i]==0)
{
i--;break;
}
}
for(int j=1;j<=i;j++)
{
cout<<"f91("<<a[j]<<") = "<<f91(a[j])<<endl;
}

return 0;
}