Your test case doesn't match up with the problem statement. The problem statement mentions monotonically decreasing, while the test case tests for just decreasing.
Finding Perfect Squares
Longest run of consecutive numbers
Wheat on a chessboard pt 1
Find the area of the four walls
Extra safe primes
Consecutive Prime Numbers
Number Puzzle - 097
Number Puzzle - 087
Splitting Square - Problem the third
Find the Pattern 6
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