one day Vasya physics practical perform task measure capacitance he follow teacher advice n measurement record result notebook after result teacher remember lesson teacher friend Petya redo experiment large small result differ time Vasya lazy want redo experiment he want task home play computer game so decide cheat Vasya show measurement teacher erase large small result remain measurement differ time in word remain measurement smallest result x large result y inequality y2x fulfill of course avoid teacher suspicion Vasya wants remove measurement result possible notesHelp Vasya find minimum number measurement result erase note large small remain result measurement differ time