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</html><description>Problem Description This is a problem of determining the direction of the line segment AB defined by two given points A(x1, y1) and B(x2, y2). The result of the direction must be one of the following three: &#x201C;UP&#x201D;: If the line segment is directed upwards &#x201C;DOWN&#x201D;: If the line segment is directed downwards &#x201C;HORIZONTAL&#x201D;: If &hellip; &#xB354; &#xBCF4;&#xAE30; ""</description></oembed>
