text: If the leaf node is encountered , then the path is printed if the size of the path vector is greater than 0
code: if ( root . left == null && root . right == null ) { if ( flag == 1 ) { ans = 1 ; System . out . print ( " ( " ) ; for ( int i = 0 ; i < path . size ( ) ; i ++ ) { System . out . print ( path . get ( i ) + " , ▁ " ) ; } System . out . print ( root . data + " ) , ▁ " ) ; } return ; }