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Integer        N,MaxN
Real U,V,W,S,D,E,a,b
Real un,vn,wn,sn
Real uu,vv,ww,ss,NN,deno

Read (*,*) MAXN,U,V,W,S,D,E
      un = 0
      vn = 0
        wn = 0
        sn = 0
        Do N = 1,MAXN
            NN = N*N
            un = un + U*NN
                vn = vn + V*NN
                wn = wn + W*NN
                sn = sn + S*NN
        End do
        deno = un*sn - wn*vn
        If (abs(deno) >= 0.000001 ) then
                a = (sn*D*MAXN - vn*E*MAXN) / deno
                b = (D*MAXN - un*a) / vn
                write(*,*) "a = ",a," b = ",b
        Else
            write(*,*) "please check the input data!"
        End if

        End
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