changed print statements to str

Author: pratikgl

pydatastructs/linear_data_structures/algorithms.py

@@ -1010,12 +1010,12 @@ def longest_increasing_subsequence(array):
     >>> from pydatastructs import longest_increasing_subsequence as LIS
     >>> array = ODA(int, [2, 5, 3, 7, 11, 8, 10, 13, 6])
     >>> longest_inc_subsequence = LIS(array)
-    >>> print(longest_inc_subsequence)
-    [2, 3, 7, 8, 10, 13]
+    >>> str(longest_inc_subsequence)
+    '[2, 3, 7, 8, 10, 13]'
     >>> array2 = ODA(int, [3, 4, -1, 5, 8, 2, 2 ,2, 3, 12, 7, 9, 10])
     >>> longest_inc_subsequence = LIS(array2)
-    >>> print(longest_inc_subsequence)
-    [-1, 2, 3, 7, 9, 10]
+    >>> str(longest_inc_subsequence)
+    '[-1, 2, 3, 7, 9, 10]'
     """
     n = len(array)
     dp = OneDimensionalArray(int, n)