Problems on Strings
Total watch time
45m 9s
at 1× speed · exactly 45 minutes, 9 seconds at 1×
| 1× | 45m 9s |
|---|---|
| 1.25× | 36m 7s |
| 1.5× | 30m 6s |
| 1.75× | 25m 48s |
| 2× | 22m 35s |
Average video15m 3s
Longest17m 46s
Shortest11m 44s
Remaining—
Plan to finish
About 1 day at an hour a day
Pick a daily pace and the days you'll watch. Ticked videos are skipped.
Days
At one hour a day, every day, this playlist takes about 1 day. Turn on JavaScript to plan around your week.
Subscribe (keeps updating)
Google Calendar (first session)
The .ics file imports into Google Calendar, Apple Calendar and Outlook — one event per study day listing that day's videos. Subscribing instead keeps the plan in step with the playlist: new videos become new sessions. In Google Calendar use Other calendars → From URL with the copied feed URL.
Videos (3)
45m 9s in total · tick what you've watched
Tick videos you've watched — progress is saved in this browser.
| Watched | ||||
|---|---|---|---|---|
| 1 |
 Anagrams
|
11:44 | 2020-03-27 | |
| 2 |
 Leftmost Character that Repeats
|
15:39 | 2020-03-27 | |
| 3 |
 Leftmost Character that doesn't Repeat
|
17:46 | 2020-03-27 |
No videos match that filter.
Embed a badge
Show the watch time in a README or course description — it links back here and updates itself
Markdown
[](https://playlistduration.com/playlist/PLKnIA16_RmvaeZFmBKvhDGL4jV9e-YraI)HTML
<a href="https://playlistduration.com/playlist/PLKnIA16_RmvaeZFmBKvhDGL4jV9e-YraI"><img src="https://playlistduration.com/badge/playlist/PLKnIA16_RmvaeZFmBKvhDGL4jV9e-YraI.svg" alt="Watch time: 45m 9s · 3 videos" width="195" height="20"></a>Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.
Want the numbers themselves? GET https://playlistduration.com/api/v1/playlist/PLKnIA16_RmvaeZFmBKvhDGL4jV9e-YraI returns them as JSON — free, no key. API docs →
Data from the YouTube Data API as of 2026-09-22 (cached). Private or deleted videos are excluded from totals.