Merge pull request #2 from sl4ureano/master

Add merge_sort and radix_sort

sorting/merge_sort.py

@@ -0,0 +1,27 @@
+def merge_sort(a):
+    if len(a) < 2:
+        return a
+    l = a[0:len(a)//2]
+    r = a[len(a)//2:]
+    return merge(merge_sort(l), merge_sort(r))
+
+
+def merge(a, b):
+    out = []
+    i = 0
+    j = 0
+    while i < len(a) or j < len(b):
+        if i >= len(a):
+            out.append(b[j])
+            j += 1
+        elif j >= len(b):
+            out.append(a[i])
+            i += 1
+        else:
+            if a[i] <= b[j]:
+                out.append(a[i])
+                i += 1
+            else:
+                out.append(b[j])
+                j += 1
+    return out

sorting/radix_sort.py

@@ -0,0 +1,14 @@
+def radix_sort(lista):
+    max_len = max([len(numero) for numero in lista])
+    padded = list([str(num).rjust(max_len, "0") for num in lista])
+
+    for pos in reversed(range(max_len)):
+        buckets = [list() for x in range(0, 10)]
+        for num in padded:
+            bucket = int(num[pos])
+            buckets[bucket] += [num]
+        padded = sum(buckets, [])
+    return padded
+
+if __name__ == "__main__":
+    print(radix_sort(["13", "105", "10", "150"]))