Edges of the tree
graph [ 1 ] . Add ( 2 ) ; graph [ 2 ] . Add ( 3 ) ; graph [ 2 ] . Add ( 4 ) ; graph [ 1 ] . Add ( 5 ) ; graph [ 5 ] . Add ( 6 ) ; dfs ( 1 , 1 ) ; Console . Write ( countTotalPangram ( n ) ) ; } }