Add facebook interview problem

java/interview/bipartition-pattern-matching.java

@@ -0,0 +1,14 @@
+/**
+ * @Company Facebook
+ *
+ * Given two strings, str and pattern, return true if the str has a valid mapping between the words in str and the characters in the pattern.
+ * The str will be whitespace separated and the pattern will be depicted using characters.
+ *
+ * Problem Ex.
+ *   Input: 'cat dog dog cat', 'abba'
+ *   Output: true because cat = a and dog = b.
+ *
+ *   Input: 'cat dog dog foo', 'abba'
+ *   Output: false because cat = a so foo cannot == a
+ */
+public boolean isValidPattern(String str, String pattern) { }