feat: menambahkan algoritma lucky number

other/lucky_number.py

@@ -0,0 +1,65 @@
+# Algoritma untuk mengecek apakah bilangan itu lucky number
+# https://en.wikipedia.org/wiki/Lucky_number
+def is_lucky_number(number):
+    """
+    Lucky number adalah angka yang selamat dari persortiran
+    angka berdasarkan posisi mirip Sieve.
+
+    >>> is_lucky_number(1)
+    'Angka Lucky'
+    >>> is_lucky_number(21)
+    'Angka Lucky'
+    >>> is_lucky_number(9)
+    'Angka Lucky'
+    >>> is_lucky_number(10)
+    'Bukan Angka Lucky'
+    >>> is_lucky_number(1232)
+    'Bukan Angka Lucky'
+    >>> is_lucky_number(700)
+    'Bukan Angka Lucky'
+
+    """
+    benar , bukan = "Angka Lucky" , "Bukan Angka Lucky"
+    MAX_NUMBER = 10000
+
+    idx = 1
+    nbr = []
+    for i in range(1 , MAX_NUMBER):
+        if i % 2 != 0:
+            nbr.append(i)
+
+    while idx < len(nbr):
+        step = nbr[idx]
+        if step > len(nbr):
+            break
+
+        new_numbers = []
+        pos = 1
+        for val in nbr:
+            if pos % step != 0:
+                new_numbers.append(val)
+            pos += 1
+        nbr = new_numbers
+        idx += 1
+
+    if number in nbr:
+        return benar
+    else:
+        return bukan
+
+
+def main(args=None):
+    import doctest
+
+    doctest.testmod()
+
+    print(is_lucky_number(1))  # Angka Lucky
+    print(is_lucky_number(21))  # Angka Lucky
+    print(is_lucky_number(9))   # Angka Lucky
+    print(is_lucky_number(10))  # Bukan Angka Lucky
+    print(is_lucky_number(80))  # Bukan Angka Lucky
+    print(is_lucky_number(897))  # Bukan Angka Lucky
+
+
+if __name__ == "__main__":
+    main()