1 <p>Our fears came back to haunt us: there were even more severe dips in traffic than before. Apparently, marketers have reopened their cybersport club and are holding competitions on random days of the week. But how do they manage to cover the tracks?</p>

2 <p>They disguised the poor traffic. The analyzer always says that average traffic is good, and no one even thinks about looking for dips there. Clever!</p>

3 <p>How did they manage to hack the program? Look at the surge in traffic at the end of the month. This is marketers pumping low-quality traffic. This peak, in turn, affects the average traffic, and it creates an appearance of being good.</p>

4 <p>It is necessary to improve the program and, in addition to the average attendance, consider median traffic, which is less sensitive to such outbursts.<a>Median</a>is a median value of an array. To get it, you first need to sort the array. Now let’s learn how to sort it.</p>

5 <p>During sorting, elements of an array are swapped. Usually this is done using an intermediate variable, into which one of the elements being swapped is stored. Try to rearrange the two elements by yourself.</p>