<?php
/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/

fscanf(STDIN, "%d",
    $n // the number of temperatures to analyse
);
$temps = stream_get_line(STDIN, 256 + 1, "\n"); // the n temperatures expressed as integers ranging from -273 to 5526
$temps_arr = explode(" ", $temps);
// Write an action using echo(). DON'T FORGET THE TRAILING \n
// To debug (equivalent to var_dump): error_log(var_export($var, true));

//echo("result\n");
//print_r($temps_arr);
error_log(var_export($temps, true));

$temps_int_arr=[];
 foreach ($temps_arr as $key=>$value)
 {
     $temps_int_arr1[]=(int)$value;
     $temps_int_arr[]=abs((int)$value);
 }

$min=5526;
$min_index=0;
foreach ($temps_int_arr as $key=>$value)
{
    if ($value<$min)
    { $min=$value;
      $min_index=$key;
        }
}

$save_value=0;
$save_neg_value=0;
// error_log(var_export($min, true));
foreach ($temps_int_arr1 as $value){

        if ($value == $min){
        $save_value = $value;
        }
        else if ($value == -$min){
        $save_neg_value = $value;
        }

    }
// error_log(var_export($save_value, true));
// error_log(var_export($save_neg_value, true));

if ($save_neg_value == -$save_value)
{
    echo ($save_value."\n");
}
else if ($save_neg_value < $save_value && $save_neg_value!=0)
{
 echo($save_neg_value."\n");
}
else
{
 echo ($save_value."\n");
}

//echo($temps_int_arr[$min_index]."\n");
   //$table[$max]=0;

// $min=array_search(min($temps_int_arr),$temps_int_arr);

// if ( array_search($temps_int_arr[$min],  $temps_int_arr1)==false && )
//  {
//      echo($temps_int_arr[$min]."\n");
//  }
// else
// {
//     echo(-$temps_int_arr[$min]."\n");
// }

?>