ccccccccccccccccccccccccccccccccccccccccccccccccc
      FUNCTION ran0(idum)
      INTEGER idum,IA,IM,IQ,IR,MASK
      REAL ran0,AM
      PARAMETER (IA=16807,IM=2147483647,AM=1./IM,IQ=127773,IR=2836,
     *MASK=123459876)
      INTEGER k
      idum=ieor(idum,MASK)
      k=idum/IQ
      idum=IA*(idum-k*IQ)-IR*k
      if (idum.lt.0) idum=idum+IM
      ran0=AM*idum
      idum=ieor(idum,MASK)
      return
      END
C  (C) Copr. 1986-92 Numerical Recipes Software *11915
ccccccccccccccccccccccccccccccccccccccccccccccccc
      FUNCTION ran1(idum)
      INTEGER idum,IA,IM,IQ,IR,NTAB,NDIV
      REAL ran1,AM,EPS,RNMX
      PARAMETER (IA=16807,IM=2147483647,AM=1./IM,IQ=127773,IR=2836,
     *NTAB=32,NDIV=1+(IM-1)/NTAB,EPS=1.2e-7,RNMX=1.-EPS)
      INTEGER j,k,iv(NTAB),iy
      SAVE iv,iy
      DATA iv /NTAB*0/, iy /0/
      if (idum.le.0.or.iy.eq.0) then
        idum=max(-idum,1)
        do 11 j=NTAB+8,1,-1
          k=idum/IQ
          idum=IA*(idum-k*IQ)-IR*k
          if (idum.lt.0) idum=idum+IM
          if (j.le.NTAB) iv(j)=idum
11      continue
        iy=iv(1)
      endif
      k=idum/IQ
      idum=IA*(idum-k*IQ)-IR*k
      if (idum.lt.0) idum=idum+IM
      j=1+iy/NDIV
      iy=iv(j)
      iv(j)=idum
      ran1=min(AM*iy,RNMX)
      return
      END
C  (C) Copr. 1986-92 Numerical Recipes Software *11915
ccccccccccccccccccccccccccccccccccccccccccccccccc
      FUNCTION ran2(idum)
      INTEGER idum,IM1,IM2,IMM1,IA1,IA2,IQ1,IQ2,IR1,IR2,NTAB,NDIV
      REAL ran2,AM,EPS,RNMX
      PARAMETER (IM1=2147483563,IM2=2147483399,AM=1./IM1,IMM1=IM1-1,
     *IA1=40014,IA2=40692,IQ1=53668,IQ2=52774,IR1=12211,IR2=3791,
     *NTAB=32,NDIV=1+IMM1/NTAB,EPS=1.2e-7,RNMX=1.-EPS)
      INTEGER idum2,j,k,iv(NTAB),iy
      SAVE iv,iy,idum2
      DATA idum2/123456789/, iv/NTAB*0/, iy/0/
      if (idum.le.0) then
        idum=max(-idum,1)
        idum2=idum
        do 11 j=NTAB+8,1,-1
          k=idum/IQ1
          idum=IA1*(idum-k*IQ1)-k*IR1
          if (idum.lt.0) idum=idum+IM1
          if (j.le.NTAB) iv(j)=idum
11      continue
        iy=iv(1)
      endif
      k=idum/IQ1
      idum=IA1*(idum-k*IQ1)-k*IR1
      if (idum.lt.0) idum=idum+IM1
      k=idum2/IQ2
      idum2=IA2*(idum2-k*IQ2)-k*IR2
      if (idum2.lt.0) idum2=idum2+IM2
      j=1+iy/NDIV
      iy=iv(j)-idum2
      iv(j)=idum
      if(iy.lt.1)iy=iy+IMM1
      ran2=min(AM*iy,RNMX)
      return
      END
C  (C) Copr. 1986-92 Numerical Recipes Software *11915
ccccccccccccccccccccccccccccccccccccccccccccccccc
      FUNCTION ran3(idum)
      INTEGER idum
      INTEGER MBIG,MSEED,MZ
C     REAL MBIG,MSEED,MZ
      REAL ran3,FAC
      PARAMETER (MBIG=1000000000,MSEED=161803398,MZ=0,FAC=1./MBIG)
C     PARAMETER (MBIG=4000000.,MSEED=1618033.,MZ=0.,FAC=1./MBIG)
      INTEGER i,iff,ii,inext,inextp,k
      INTEGER mj,mk,ma(55)
C     REAL mj,mk,ma(55)
      SAVE iff,inext,inextp,ma
      DATA iff /0/
      if(idum.lt.0.or.iff.eq.0)then
        iff=1
        mj=MSEED-iabs(idum)
        mj=mod(mj,MBIG)
        ma(55)=mj
        mk=1
        do 11 i=1,54
          ii=mod(21*i,55)
          ma(ii)=mk
          mk=mj-mk
          if(mk.lt.MZ)mk=mk+MBIG
          mj=ma(ii)
11      continue
        do 13 k=1,4
          do 12 i=1,55
            ma(i)=ma(i)-ma(1+mod(i+30,55))
            if(ma(i).lt.MZ)ma(i)=ma(i)+MBIG
12        continue
13      continue
        inext=0
        inextp=31
        idum=1
      endif
      inext=inext+1
      if(inext.eq.56)inext=1
      inextp=inextp+1
      if(inextp.eq.56)inextp=1
      mj=ma(inext)-ma(inextp)
      if(mj.lt.MZ)mj=mj+MBIG
      ma(inext)=mj
      ran3=mj*FAC
      return
      END
C  (C) Copr. 1986-92 Numerical Recipes Software *11915
ccccccccccccccccccccccccccccccccccccccccccccccccc