<input type="hidden" name="problem" value="problem_id">
<input type="hidden" name="contest" value="contest_id">
<div class="form-group"><label for="prog">File:</label><input id="prog" name="prog" type="file"></div>
<div class="form-group"><label for="source_code">Source code:</label> <textarea class="form-control" id="source_code" name="source_code"></textarea></div>
<div class="form-group"><label for="prog_format">File format:</label><select id="prog_format" name="prog_format" class="form-control" required>
<input type="hidden" name="problem" value="problem_id">
<input type="hidden" name="contest" value="contest_id">
<div class="form-group"><label for="prog">File:</label><input id="prog" name="prog" type="file"></div>
<div class="form-group"><label for="source_code">Source code:</label> <textarea class="form-control" id="source_code" name="source_code"></textarea></div>
<div class="form-group"><label for="prog_format">File format:</label><select id="prog_format" name="prog_format" class="form-control" required>