#include <stdio.h>
int f91(int y);
int main()
{
    int N, x;
    while(scanf("%d", &N) == 1 && N != 0){
        x = f91(N);
        printf("%d\n", x);
    }
}

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