Counter game

def counterGame(n)
  setbits = bin(n-1).count('1')

  if setbits%2 == 0:
    return 'Richard'
  else:
    return 'Louise'

<?php

/*
 * Complete the 'counterGame' function below.
 *
 * The function is expected to return a STRING.
 * The function accepts LONG_INTEGER n as parameter.
 */

function counterGame($initial_number)
{
    // calculate bit 1 number for play game times
    $play_game_times = 0;

    $initial_number -= 1;
    while($initial_number) {
        // if the number is exponent 2(last 1 occur), then the result will be 0, and end the while loop
        $initial_number = $initial_number & ($initial_number -1);
        $play_game_times++;
    }

    // calculate play game times to find winner
    if ($play_game_times % 2 == 0) {
        $winner = 'Richard';
    } else {
        $winner = 'Louise';
    }

    return $winner;
}

$fptr = fopen(getenv("OUTPUT_PATH"), "w");

$t = intval(trim(fgets(STDIN)));

for ($t_itr = 0; $t_itr < $t; $t_itr++) {
    $n = intval(trim(fgets(STDIN)));

    $result = counterGame($n);

    fwrite($fptr, $result . "\n");
}

fclose($fptr);

int setBits(unsigned long long int n) {
    int count = 0 ;
    while(n) {
    	n &= (n-1) ;
        count ++ ;
    }
    return count ;
}

int main() {
    int t ;
    scanf("%d\n",&t) ;
    while(t--) {
        unsigned long long int n ;
        scanf("%llu\n",&n) ;
        if (setBits(n-1) & 1) printf("Louise\n") ;
        else printf("Richard\n") ;
    }
    return 0;
}