Fix sorts/radix_sort (#338)

sorts/radix_sort.py

@@ -1,28 +1,26 @@
 def radixsort(lst):
-  RADIX = 10
-  maxLength = False
-  tmp , placement = -1, 1
+    RADIX = 10
+    placement = 1
 
-  while not maxLength:
-    maxLength = True
-    # declare and initialize buckets
-    buckets = [list() for _ in range( RADIX )]
+    # get the maximum number
+    max_digit = max(lst)
 
-    # split lst between lists
-    for i in lst:
-      tmp = int((i / placement) % RADIX)
-      buckets[tmp].append(i)
+    while placement < max_digit:
+      # declare and initialize buckets
+      buckets = [list() for _ in range( RADIX )]
 
-      if maxLength and tmp > 0:
-        maxLength = False
+      # split lst between lists
+      for i in lst:
+        tmp = int((i / placement) % RADIX)
+        buckets[tmp].append(i)
 
-    # empty lists into lst array
-    a = 0
-    for b in range( RADIX ):
-      buck = buckets[b]
-      for i in buck:
-        lst[a] = i
-        a += 1
+      # empty lists into lst array
+      a = 0
+      for b in range( RADIX ):
+        buck = buckets[b]
+        for i in buck:
+          lst[a] = i
+          a += 1
 
-    # move to next
-    placement *= RADIX
+      # move to next
+      placement *= RADIX