Recursive caching implementation
def solve(n): even_terms = [] i = 2 current = 0 while current <= n: current = fib(i) even_terms.append(current) i += 3 return sum(even_terms) def fib(n, cache={1: 1, 2: 2}): if n not in cache: cache[n] = fib(n-1, cache) + fib(n-2, cache) return cache[n]
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Recursive caching implementation