int_to_romans.py

def int_to_roman(num: int) -> str:
  ones = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]
  tens = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"]
  hrns = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"]
  ths = ["", "M", "MM", "MMM"]

  return ths[num // 1000] + hrns[(num % 1000) // 100] + tens[(num % 100) // 10] + ones[num % 10]


print(int_to_roman(3))    # Output: "III"
print(int_to_roman(58))   # Output: "LVIII"
print(int_to_roman(1994)) # Output: "MCMXCIV"
print(int_to_roman(2025)) # Output: "MMXXV"
print(int_to_roman(3999)) # Output: "MMMCMXCIX"