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POST ORDER TRAVERSAL -- HACKERRANK SOLUTIONS

  Complete the   function in the editor below. It received   parameter: a pointer to the root of a binary tree. It must print the values in the tree's postorder traversal as a single line of space-separated values. Input Format Our test code passes the root node of a binary tree to the   function. Constraints   Nodes in the tree    Output Format Print the tree's postorder traversal as a single line of space-separated values. Sample Input 1 \ 2 \ 5 / \ 3 6 \ 4 Sample Output 4 3 6 5 2 1 Explanation The postorder traversal is shown. Solution #include   < stdio.h > #include   < string.h > #include   < math.h > #include   < stdlib.h > struct  node {           int  data;      struct  node *left;      struct  node *ri...