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  1. i=raw_input()
  2. O=3*int(i[1:i.find('H')]or 1)+1;C=2*int(i[1:i.find('H')]or 1);print"2"+i+" + "+`O`+"O2"+" > "+i[i.find('H')+1:]+"H2O"+ " + "+`C`+"CO2"
Success #stdin #stdout 0.01s 8976KB
stdin
CH4
stdout
2CH4 + 4O2 > 4H2O + 2CO2