Stores the graph
var graph = Array . from ( Array ( 7 ) , ( ) => Array ( ) ) ; graph [ 0 ] . push ( new pair ( 1 , 2 ) ) ; graph [ 0 ] . push ( new pair ( 2 , 3 ) ) ; graph [ 0 ] . push ( new pair ( 3 , 2 ) ) ; graph [ 1 ] . push ( new pair ( 4 , 4 ) ) ; graph [ 1 ] . push ( new pair ( 0 , 1 ) ) ; graph [ 2 ] . push ( new pair ( 4 , 5 ) ) ; graph [ 2 ] . push ( new pair ( 5 , 6 ) ) ; graph [ 3 ] . push ( new pair ( 5 , 7 ) ) ; graph [ 3 ] . push ( new pair ( 0 , 1 ) ) ; graph [ 4 ] . push ( new pair ( 6 , 4 ) ) ; graph [ 5 ] . push ( new pair ( 4 , 2 ) ) ; graph [ 6 ] . push ( new pair ( 7 , 11 ) ) ;