📜 WAYPOINT LESSON
Checkpoint: Collections
⭐ beginner⏳ 15 min read📍 Lesson 27 of 204
One graded challenge: word frequency with map — insert-or-count done right.
Checkpoint — collections. Pass the graded challenge below to finish the module.
The classic word-frequency task, graded on the exact behaviors where operator[] vs .at()/count matters.