#include <stdio.h>

int main() {
  int i;
  unsigned long long int j,cl,maxcl=0,besti;
  for (i = 1; i < 1000000; i++) {
    j = i;
    cl = 0;
    while (j > 1) {
      if (j % 2 == 0) {
        j = j / 2;
      } else if (j > 1) {
        j = 3 * j + 1;
      }
      cl++;
    }
    if (cl > maxcl) {
      maxcl = cl;
      besti = i;
    }
  }
  printf("Best chain length: %llu.  Best start value: %llu.\n", maxcl, besti);
  return 0;
}