<?php
$n = trim(fgets(STDIN));
$p = trim(fgets(STDIN));
$count = $p;

for ($i = 1; $i < $n; $i++) {
     $g = $count + (1-$p)*$p;
     if($i >= 200){
        break;
    }
}

if($g >= 1){
    echo 1;
}else{
    echo $g;
}
?>