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16
Task/Entropy/Aime/entropy.aime
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16
Task/Entropy/Aime/entropy.aime
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integer c;
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real h, v;
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index x;
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data s;
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for (, c in (s = argv(1))) {
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x[c] += 1r;
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}
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h = 0;
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for (, v in x) {
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v /= ~s;
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h -= v * log2(v);
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}
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o_form("/d6/\n", h);
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