Ranked coding practice that actually feels alive.

Hint-mode Rena coaches edge cases, syntax, and test discipline without turning the rep into a live match.

Short logic rounds use their own Puzzle Rush rating, separate from ranked Elo.

x = {'a': 1}
y = {'b': 2}
z = {**x, **y}
print(z)

Self-ghosts add solo pressure, practice XP, and shareable receipts while ranked Elo stays untouched.

Arrays, graphs, DP, strings, heaps, search, and more, all accessible from practice.

Interview-style sessions train how you reason, verify, and talk through the work.

Guided practice and interview prep reward clear reasoning, test discipline, and explanation.

Educators can turn competitive practice into live teaching sessions and reviewable outcomes.

The skills trained here connect directly to future assessment evidence for AI-era work.

Vibecoding Courses start without syntax, then point learners toward real practice and competition.

for ball in world.balls:
    if ball.color == "green":
        rena.move_to(green_box)
        rena.drop()