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| 1 | # "Do U know Y this works?" | |
| 2 | ||
| 3 | U = lambda f: f(f) | |
| 4 | ||
| 5 | Y = lambda f: lambda n: f(Y(f))(n) | |
| 6 | ||
| 7 | @U | |
| 8 | def fact(g): | |
| 9 | return lambda n: (n < 2) and 1 or n * g(g)(n - 1) | |
| 10 | ||
| 11 | print(fact(5)) | |
| 12 | ||
| 13 | @Y | |
| 14 | def fib(g): | |
| 15 | return lambda n: (n >= 2) and g(n - 1) + g(n - 2) or n | |
| 16 | ||
| 17 | print(fib(6)) |
