Mine
public python v1 · immutablen=p=0for c in raw_input(): x={77:1000,68:500,67:100,76:50,88:10,86:5,73:1}[ord(c)] if p<x:n-=p*2 p=x;n+=xprint nn=p=0for c in raw_input(): x={77:1000,68:500,67:100,76:50,88:10,86:5,73:1}[ord(c)] if p<x:n-=p*2 p=x;n+=xprint n