site: https://www.hackerrank.com/challenges/while-language-fp
$ php test1.php
10
100
10
100
$ php test2.php
0
531950728
1000000007
10000
$ php test3.php
5050
site: https://www.hackerrank.com/challenges/while-language-fp
$ php test1.php
10
100
10
100
$ php test2.php
0
531950728
1000000007
10000
$ php test3.php
5050