Submission #1589744

---

Source Code Expand

<?php
$n = trim(fgets(STDIN));
$s = trim(fgets(STDIN));
$x[] = 0;
$i = 0;
while($i < $n){
if($s[$i] == "I"){
$x[$i + 1] = $x[$i] + 1;
}else{
$x[$i + 1] = $x[$i] - 1;
}
++$i;
}
echo max($x);

Submission Info

Judge Result