<?php
session_start();
if (!isset($_SESSION['loggedin'])) {
    exit("unauthorized");
}

include "../database.php";

$problem_id = $_POST["problem_id"];

$sql_delete = "DELETE FROM problems WHERE id = " . $problem_id . "";
if ($con->query($sql_delete) === true) {
    echo "ok";
} else {
    echo "error";
}