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#pragma once
#include <utility>
namespace NKiwiAggr {
using TWeightedValue = std::pair<double, double>; // value, weight
using TQualityFunction = TWeightedValue (*)(const TWeightedValue&, const TWeightedValue&);
TWeightedValue CalcDistanceQuality(const TWeightedValue& left, const TWeightedValue& right);
TWeightedValue CalcWeightQuality(const TWeightedValue& left, const TWeightedValue& right);
TWeightedValue CalcWardQuality(const TWeightedValue& left, const TWeightedValue& right);
}
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