Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"
Make one big string out of two smaller strings
Find the stride of the longest skip sequence
Find nth maximum
Calculate a Damped Sinusoid
Pandigital number n°1 (Inspired by Project Euler 32)
Find my secret number
Find Missing Number
Sum of big primes without primes
Find indices of diagonal elements
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