integer ngroup,igroup,ntotgr,numch,irestart,ndiff
      double precision diffcut
      common/alphaa/ ngroup(mxgr),igroup(3,mxang,mxgr),ntotgr,numch
      common/csa_input/cut1,cut2,eglob_csa,estop,jstart,jend,
     & n1,n2,n3,n4,n5,n6,n7,n8,n9,n14,n15,n16,n17,n18,n0,
     & is1,is2,nseed,ntotal,icmax,nstmax,irestart,nran0,nran1,irr,
     & nglob_csa,nmin_csa,ndiff
      logical ldih_bias
      common/dih_control/rdih_bias,ldih_bias
      common/diffcuta/ diffcut