diff --git a/roman-time.js b/roman-time.js
index f66353e..091212d 100644
--- a/roman-time.js
+++ b/roman-time.js
@@ -5,8 +5,42 @@
 * @returns {String} – время римскими цифрами (IX:V)
 */
 function romanTime(time) {
- // Немного авторского кода и замечательной магии
- return time;
+ if (typeof time !== 'string') {
+ throw new TypeError('Неверное время');
+ }
+
+ var arr = time.split(':');
+
+ if (arr.length> 2) {
+ throw new TypeError('Неверное время');
+ }
+
+ var hours = Number(arr[0]);
+ var minutes = Number(arr[1]);
+
+ if ((isNaN(hours)) || (isNaN(minutes)) || isWrongTime(hours, minutes)) {
+ throw new TypeError('Неверное время');
+ }
+
+ return convertToRoman(hours) + ':' + convertToRoman(minutes);
+}
+
+function isWrongTime(hours, minutes) {
+ return (hours !== parseInt(hours)) || (minutes !== parseInt(minutes)) ||
+ (hours < 0) &#124;&#124; (hours> 23) &#124;&#124; (minutes < 0) &#124;&#124; (minutes> 59);
+}
+
+function convertToRoman(number) {
+ if (number === 0) {
+ return 'N';
+ }
+
+ var tens = parseInt(number / 10);
+ var ones = number % 10;
+ var romanTens = ['', 'X', 'XX', 'XXX', 'XL', 'L'];
+ var romanOnes = ['', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'];
+
+ return romanTens[tens] + romanOnes[ones];
 }
 
 module.exports = romanTime;
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://github.com/urfu-2016/javascript-task-1/compare/master...bvvvvb:javascript-task-1:master.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://github.com/urfu-2016/javascript-task-1/compare/master...bvvvvb:javascript-task-1:master.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>