//uva11636 #include<cstdio> int main() { int a[20] = {0}, cas = 1, n; a[0] = 1, a[1] = 2; for (int i = 2; i<20; i++) a[i] = a[i-1]*2; while (scanf("%d", &n) && n >= 0){ for (int i = 0; i<20; i++){ if (n <= a[i]){ printf("Case %d: %d\n", cas, i); break; } } cas++; } }