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Explanation: Consider an example of a?b?c:d:e
1. We will keep on traversing the string and make a new node for every character.
2. If we get next character as '?' we update the string and call the recursive build function for left child of the node.
3. If we get next character as ':' we just update the string and return so that the remaining string can be added as the right child of the upper node.
- apoorv4104.perfect May 04, 2017