Plus/Minus Simulator
PHP
Medium
4 views
Problem Description
Line1 x. Line2 ops string. '+' means x++, '-' means x--. Print final x.
Input Format
Line1 x. Line2 ops.
Output Format
One integer final x.
Official Solution
<?php
$inputLines=preg_split('/\\R/', trim(stream_get_contents(STDIN)));
if(!$inputLines || trim($inputLines[0])==='') exit;
$x=intval($inputLines[0]);
$ops=$inputLines[1] ?? '';
for($i=0,$n=strlen($ops);$i<$n;$i++){
if($ops[$i]==='+') $x++; else if($ops[$i]==='-') $x--;
}
echo $x;
?>
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