The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Well-known measures of presortedness, among others, are the number of inversions needed to sort the input sequence, or the minimal number of blocks of consecutive elements that remain as such in the sorted sequence. In this paper we study the problem of possible composition of measures. For example, after determining the blocks in an input sequence, it is meaningful to measure how many inversions...