from typing import List


def find_min(lst: List[int]) -> int:
    """
    Return the smallest value in <lst>.

    >>> find_min([3, 4, 5, 6, 7])
    3
    >>> find_min([5, 6, 7, 3, 4])
    3
    """
    smallest = lst[0]
    for i in range(len(lst)):
        if lst[i] < smallest:
            smallest = lst[i]
    return smallest