Unneccesary new line php - php

Question

I have a PHP code. The code is supposed to print the output followed by a new line.
The code works fine but i have unneccesary new line at the end. There should be only one newline at the end, but my code prints several new lines. What could be the issue? Please help.
<?php
/* Read input from STDIN. Print your output to STDOUT*/
$fp = fopen("php://stdin", "r");
//Write code here
$loop = 0;
$n = 0; $arr = [];
while(!feof($fp)) {
$arr = []; $n = 0;
if($loop == 0) {
$total = fgets($fp);
}
else {
if($loop%2 == 1) {
$n = fgets($fp);
}
else {
$arr = fgets($fp);
}
}
if($loop > 0 && $loop%2 == 0) {
$arr = explode(" ", $arr);
$m = [];
for($i = 0; $i < 1<<10; $i++) {
$m[$i] = -1;
}
$n = count($arr);
$r = 0;
for($i = 0; $i < 1<<10; $i++) {
$r = max($r, fd_sum($i, $m, $arr, $n));
}
echo $r."\n";
}
$loop++;
}
fclose($fp);
?>
<?php
function fd_sum($i, $m, $arr, $n) {
if($i == 0) {
return $m[$i] = 0;
}
else if($m[$i] != -1) {
return $m[$i];
}
else {
$rr = 0;
for($j = 0; $j < $n; $j++) {
$num = (int)$arr[$j];
$b = save($num);
if(($i | $b) == $i) {
$z = $i^save($num);
$y = fd_sum($z, $m, $arr, $n);
$v = ($y + $num);
$rr = max($v, $rr);
}
}
return $m[$i] = $rr;
}
}
?>
<?php
function save($nm)
{
$x = 0;
for($i = 1; $nm/$i > 0; $i *= 10) {
$d = ($nm/$i) % 10;
$x = $x | (1 << $d);
}
return $x-1;
}
?>
My input is
3
4
3 5 7 2
5
121 3 333 23 4
7
32 42 52 62 72 82 92
My output is
17
458
92
-
-
-
-
The expected output is
17
458
92
-
Note : I have used '-' to indicate a new line
What am i doing wrong? Please help.

Answer 1

The PHP interpreter is reading the new lines after the closing tags and just spitting it right back out as output. Removing the extra opening/closing tags should remove the extra new lines.
Also, php closing tags are not necessary and i recommend omitting them.
<?php
/* Read input from STDIN. Print your output to STDOUT*/
$fp = fopen("php://stdin", "r");
//Write code here
$loop = 0;
$n = 0; $arr = [];
while(!feof($fp)) {
$arr = []; $n = 0;
if($loop == 0) {
$total = fgets($fp);
}
else {
if($loop%2 == 1) {
$n = fgets($fp);
}
else {
$arr = fgets($fp);
}
}
if($loop > 0 && $loop%2 == 0) {
$arr = explode(" ", $arr);
$m = [];
for($i = 0; $i < 1<<10; $i++) {
$m[$i] = -1;
}
$n = count($arr);
$r = 0;
for($i = 0; $i < 1<<10; $i++) {
$r = max($r, fd_sum($i, $m, $arr, $n));
}
echo $r."\n";
}
$loop++;
}
fclose($fp);
function fd_sum($i, $m, $arr, $n) {
if($i == 0) {
return $m[$i] = 0;
}
else if($m[$i] != -1) {
return $m[$i];
}
else {
$rr = 0;
for($j = 0; $j < $n; $j++) {
$num = (int)$arr[$j];
$b = save($num);
if(($i | $b) == $i) {
$z = $i^save($num);
$y = fd_sum($z, $m, $arr, $n);
$v = ($y + $num);
$rr = max($v, $rr);
}
}
return $m[$i] = $rr;
}
}
function save($nm)
{
$x = 0;
for($i = 1; $nm/$i > 0; $i *= 10) {
$d = ($nm/$i) % 10;
$x = $x | (1 << $d);
}
return $x-1;
}