Saturday-golf time - HackerEarth Problem Solution

Saturday-golf time - HackerEarth Problem Solution

Input:

1
10

Output:

1.000000000000

PHP Implementation:

<?php fscanf(STDIN,"%d",$t); while($t--) { fscanf(STDIN,"%d",$N); $out=0; for($i=0;$i<=N;$i++) { $div=pow(-1,$i); $dir=(2*$i)+1; $out=$out+(float)($div/$dir); } fprintf(STDOUT,"%0.12f",$out); } ?>