Format method was added

src/Task9.java

@@ -521,4 +521,14 @@ class Utils{
     return Integer.parseInt(brTest.readLine().trim());
   }
 
+  public static String formatTime(int time){
+    StringBuilder sb = new StringBuilder();
+    if(time/360000>0) sb.append(time / 360000).append(":");
+    int minutes = time % 360000;
+    if(minutes/60000>0) sb.append(minutes/60000).append(":");
+    int seconds = time % 60000;
+    sb.append(seconds);
+    return sb.toString();
+  }
+
 }