Add Longest Palindrom

Author: dwipam

practice/longest_palindromic_substr.py

@@ -0,0 +1,11 @@
+str1 = "abababa"
+
+max_length = 1
+for i in range(1,len(str1)-1):
+	k = i
+	l = i
+	while k>=0 and l<=len(str1)-1 and str1[l] == str1[k]:
+		k-=1
+		l+=1
+	max_length = max(l-1-k, max_length)
+print max_length

practice/quicksort.py

@@ -9,8 +9,6 @@ def partition(a,li,hi):
         if a[i] <= a[hi]:
             j+=1
             t = a[j]
-            a[j] = a[i]
-            a[i] = t
     t = a[j+1]
     a[j+1] = a[hi]
     a[hi] = t