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Internship at facebook

Name: Anonymous 2012-03-18 16:46

Hi
this year i'm going to go on internship to Facebook. Has smb worked there? Any feedback?

Name: Anonymous 2012-03-18 19:13

unsigned sum2(unsigned n) {

     unsigned sum = 0;

     while (n) {

          sum += n&1;

          n >>= 1;

     }

     return sum;

}

Name: Anonymous 2012-03-18 19:27



unsigned int sum2(unsigned int n){

  unsigned int c;

  c = ((n & 0xfff) * 0x1001001001001ULL & 0x84210842108421ULL) % 0x1f;

  c += (((n & 0xfff000) >> 12) * 0x1001001001001ULL & 0x84210842108421ULL) % 0x1f;

  c += ((n >> 24) * 0x1001001001001ULL & 0x84210842108421ULL) % 0x1f;

  return c;

}

Name: Anonymous 2012-03-18 19:31



unsigned int sum2(unsigned int n){

  unsigned int c;

  for (c = 0; n; c++) n &= n - 1;

  return c;

}

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