# calculate Fibonacci(20)
# for benchmark
def fib(n)
if n<2
n
else
fib(n-2)+fib(n-1)
end
end
print(fib(20), "\n");
# calculate Fibonacci(20)
# for benchmark
def fib(n)
if n<2
n
else
fib(n-2)+fib(n-1)
end
end
print(fib(20), "\n");
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