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# wielomian.awk
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{
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    n = NF
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    first = 1
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    for (i = 1; i <= NF; i++) {
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        coeff = $i
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        exp = n - i
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        if (coeff == 0 || exp == 1)
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            continue
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        if (!first)
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            printf "+"
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        first = 0
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        if (exp == 0)
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            printf "%s", coeff
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        else
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            printf "%sx^%s", coeff, exp
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    }
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    printf "\n"
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}