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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 15

Caterpillar method

Open reading material (PDF)

Tasks:

easy

AbsDistinct

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Compute number of distinct absolute values of sorted array elements.
easy

CountDistinctSlices

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Count the number of distinct slices (containing only unique numbers).
easy

CountTriangles

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Count the number of triangles that can be built from a given set of edges.
medium

MinAbsSumOfTwo

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Find the minimal absolute value of a sum of two elements.