Hard Problem

1 min 49 secs

5 mins 59 secs

6 mins 6 secs

6 mins 9 secs

6 mins 5 secs

6 mins 33 secs

10 mins 13 secs

6 mins 7 secs

13 mins 30 secs

6 mins 12 secs

5 mins 48 secs

6 mins 9 secs

7 mins 49 secs

4 mins 59 secs

5 mins

15 mins 40 secs

12 mins 37 secs

25 mins 28 secs

30 mins 41 secs

8 mins 50 secs

8 mins 45 secs

8 mins 40 secs

8 mins 40 secs

4 mins 17 secs

11 mins 37 secs

25 mins 31 secs

5 mins

10 mins

10 mins 5 secs

58 secs

7 mins 4 secs

5 mins 27 secs

11 mins 46 secs

8 mins

1 min 22 secs

1 hour 25 mins 56 secs

26 mins 28 secs

6 mins 14 secs

10 mins 8 secs

9 mins 47 secs