argh...i have seen the question before...done it before..reviewed it several times before...and still...i can't do the question...well done, zhansheng...

the 'magic' in cn1111...you simply dunno what to do...how to draw the flow chart...what variables to label...which unknowns to find...which wonderful equations to use...

haha...it's driving me crazy....crraaazzzzyyyyy!!!!!!

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seriously wish that wednesday can be over soon...

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