Python / Data Structures
Creating a dictionary from a list of integers
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Given a list of integers, this function will return a dictionary with the integers as keys and the number of times the integer appears in the list as values.
Finding the Longest Increasing Subsequence in an Array
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The problem is to find the length of the longest increasing subsequence in an array. For example, given the array [10, 22, 9, 33, 21, 50, 41, 60, 80], the longest increasing subsequence would be of length 6, and would be [10, 22, 33, 50, 60, 80].
Sum of integers divisible by 3 in a list
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The function should take a list of integers as input and return the sum of the integers in the list that are divisible by 3.
Sum of elements in a list of integers
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This technical problem deals with finding the sum of all the elements in a list of integers. An example input would be [1, 2, 3, 4, 5], and the corresponding output would be 15.
Find the indices of two numbers that add up to the target value in a list of...
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The problem is to find the indices of two numbers in a list of integers that add up to a given target value. An example input would be [2, 7, 11, 15] with a target value of 9, and the expected output would be [0, 1].
Find the sum of the integers at even indices in a list.
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Given a list of integers, this program will find the sum of the integers at even indices. So, for the example input above, the output would be 12 (2 + 4 + 6 ).
Counting Elements in a List
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The technical problem is to write a Python script to return a dictionary containing the count of each unique integer in a given list. For example, given the list [1, 2, 1, 2, 1, 3, 3, 3, 4, 4, 4, 4], the expected output would be {1: 3, 2: 2, 3: 3, 4: 4}.
Counting the Occurrences of Integers in a List
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This problem asks you to write a function that takes a list of integers and returns a dictionary with the integers as keys and the number of times they appear in the list as values.
