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AVAILABLE LESSONS:
Lesson 1
Iterations
Lesson 2
Arrays
Lesson 3
Time Complexity
Lesson 4
Counting Elements
Lesson 5
Prefix Sums
Lesson 6
Sorting
Lesson 7
Stacks and Queues
Lesson 8
Leader
Lesson 9
Maximum slice problem
Lesson 10
Prime and composite numbers
Lesson 11
Sieve of Eratosthenes
Lesson 12
Euclidean algorithm
Lesson 13
Fibonacci numbers
Lesson 14
Binary search algorithm
Lesson 15
Caterpillar method
Lesson 16
Greedy algorithms
Lesson 17
Dynamic programming
Lesson 99
Future training
Lesson 7

Stacks and Queues

Open reading material (PDF)

Tasks:

easy

Brackets

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Determine whether a given string of parentheses (multiple types) is properly nested.
easy

Fish

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N voracious fish are moving along a river. Calculate how many fish are alive.
easy

Nesting

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Determine whether a given string of parentheses (single type) is properly nested.
easy

StoneWall

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Cover "Manhattan skyline" using the minimum number of rectangles.