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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from typing import List
def generate_numbers(numbers: List[int], x: int, y: int, current: str) -> List[int]:
if x == 0:
return [int(current)] if int(current) < y else []
result = []
for num in numbers:
result.extend(generate_numbers(numbers, x - 1, y, current + str(num)))
return result
if __name__ == "__main__":
L = [0, 1, 2, 5]
X = 2
Y = 21
output = generate_numbers(L, X, Y, "")
print(", ".join(map(str, output)))
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