Solution LAB2 guanine 3

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For calculation of E(N-1) we need to set the following flags in the &SYSTEM namelist:

nspin=2               ! Note, now we have unpaired electrons:
tot_charge=+1         ! charged system
tot_magnetization=1   ! we need to set a total magnetisation

Also, the following option needs to be used for charged systems :

assume_isolated="mt"