计算图的传递闭包

计算图的传递闭包
Procedure Longlink;
Var
T:array[1..maxn,1..maxn] of boolean;
Begin
Fillchar(t,sizeof(t),false);
For k:=1 to n do
For I:=1 to n do
  For j:=1 to n do T[I,j]:=t[I,j] or (t[I,k] and t[k,j]);
End;