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Topic: Array Problem / Level: beginner
Problem:
Check if a given 2D matrix is sparse (more than half of its elements are zero).
More Problems
Find the maximum element in each diagonal of a 2D array.
Find the sum of the boundary elements of a 2D matrix.
Check if an array is monotonic (either entirely non-increasing or non-decreasing).
Count the number of prime numbers in an array.
Find the greatest common divisor (GCD) of all elements in an array.
Find the least common multiple (LCM) of all elements in an array.
Find the sum of elements in an array until a negative number is encountered.
Replace all even numbers in an array with their square.
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