<?php
fscanf (STDIN, "%f", $number);
$number += 0.00000000000000;
if ($number >= 0 && $number <= 25) {
    echo "Intervalo [0,25]\n";
} elseif ($number > 25 && $number <= 50) {
    echo "Intervalo (25,50]\n";
} elseif ($number > 50 && $number <= 75) {
    echo "Intervalo (50,75]\n";
} elseif ($number > 75 && $number <=100) {
    echo "Intervalo (75,100]\n";
} elseif ($number < 0.00000000000000 || $number > 100.00000000000000) {
    echo "Fora de intervalo\n";
}
?>