This is a lot funnier in context, and I urge all of you to watch the film, which itself is a collection of 3 shorts.
College student protagonist named Shurik finds a girl named Lida who had notes for an upcoming exam. Being so engaged by studying Lida doesn't realize that Shurik is not her girl friend who was left behind sleeping on a bus. The gag is that there's no sexual tension between them.
Which changes the next day as Shurik and Lida actually encounter each other after the exam and unknowingly retrace their steps frog the day before. It's delightful, and very 1960 USSR.
You can watch the film here in pretty good quality. English subtitles are available, but I haven't checked them out personally. A lot of it is mostly classic style physical comedy though:
