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a=0 ("+ "+ARGF"+$<.read).split.each_slice 2{|b,c|a=a.send b,c.to_f} p a
a=0 ("+ "+ARGF.read).split.each_slice 2{|b,c|a=a.send b,c.to_f} p a
a=0 ("+ "+$<.read).split.each_slice 2{|b,c|a=a.send b,c.to_f} p a
a=0 ("+ "+ARGF.read).split.each_slice( 2){|b,c|a=a.send b,c.to_f} p a
a=0 ("+ "+ARGF.read).split.each_slice(2){|b,c|a=a.send b,c.to_f} p a
a=0 ("+ "+ARGF.read).split.each_slice(2){|b,c|a=a.send( b,c.to_f)} p a
a=0 ("+ "+ARGF.read).split.each_slice(2){|b,c|a=a.send(b,c.to_f)} p a
