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2?????????????25%?????????????????????
3?????50%???????0.5?????????????????????
4???????75%??????0.75?????????
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3???????0.5????????????????1????????????6??????????2?κ??1?γ?????4???????????С????????????????3?????????18????????????18?????????6?Σ????3?Ρ?
4???????0.75??????????3??????????????4?Σ?????????3/4??????????????????4?β?????3?Σ?4?????????????????16?????!
??????3???????????????4?????????16?????????3?????18???????
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????е???????????ζ?3??????????????4??5?Σ????????????????????????100?????????????????????50%?????
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