New challenge every day at midnight IST
Daily Learning
One DSA problem + one backend concept every day. Build the habit that compounds.
🔥 —Current streak
—Best streak
00:00:00Until next challenge
Saturday, 19 September 2026Today
Today's Problem
Loading…
Today's Concept
CompletableFuture Composition
thenApply transforms a result (sync). thenCompose chains futures (like flatMap). thenCombine merges two independent futures. exceptionally handles errors. allOf waits for all; anyOf resolves with the first. Always specify an executor for I/O tasks.
Streak milestones
🔥
3-Day Streak
3 days
⚡
Week Warrior
7 days
🌟
Monthly Machine
30 days
💎
100 Days
100 days
- New problem + concept drops every day at midnight IST.
- Attempt the problem, read the concept, then click Check In to save your streak.
- Miss a day and your streak resets. Your best streak is always saved.