Remove duplicates from string

python_implemented/kadanes_algorithm.py

@@ -0,0 +1,30 @@
+from sys import maxsize
+
+def maxSubArraySum(a, size):
+    max_so_far = -maxsize - 1
+    max_ending_here = 0
+    start = 0
+    end = 0
+    s = 0
+
+    for i in range(0, size):
+
+        max_ending_here += a[i]
+
+        if max_so_far < max_ending_here:
+            max_so_far = max_ending_here
+            start = s
+            end = i
+
+        if max_ending_here < 0:
+            max_ending_here = 0
+            s = i + 1
+
+    print ("Maximum contiguous sum is %d" % (max_so_far))
+    print ("Starting Index %d" % (start))
+    print ("Ending Index %d" % (end))
+
+
+# Driver program to test maxSubArraySum
+a = [-2, -3, 4, -1, -2, 1, 5, -3]
+maxSubArraySum(a, len(a))

python_implemented/remove_duplicates_from_string.py

@@ -0,0 +1,46 @@
+# Python program to remove duplicate characters from an
+# input string
+NO_OF_CHARS = 256
+
+
+# Since strings in Python are immutable and cannot be changed
+# This utility function will convert the string to list
+def toMutable(string):
+    List = []
+    for i in string:
+        List.append(i)
+    return List
+
+
+# Utility function that changes list to string
+def toString(List):
+    return ''.join(List)
+
+
+# Function removes duplicate characters from the string
+# This function work in-place and fills null characters
+# in the extra space left
+def removeDups(string):
+    bin_hash = [0] * NO_OF_CHARS
+    ip_ind = 0
+    res_ind = 0
+    temp = ''
+    mutableString = toMutable(string)
+
+    # In place removal of duplicate characters
+    while ip_ind != len(mutableString):
+        temp = mutableString[ip_ind]
+        if bin_hash[ord(temp)] == 0:
+            bin_hash[ord(temp)] = 1
+            mutableString[res_ind] = mutableString[ip_ind]
+            res_ind += 1
+        ip_ind += 1
+
+    # After above step string is stringiittg.
+    # Removing extra iittg after string
+    return toString(mutableString[0:res_ind])
+
+
+# Driver program to test the above functions
+string = "amulyasahoo"
+print removeDups(string)