I am uncertain about the Codeforces rating system, as it appears confusing to me. In Codeforces round 890 -:

Friend 1, with a rating of 1126 and a global rank of 4550, experienced a rating increase of +71. On the other hand, friend 2, who held a rating of 1278 and attained a global rank of 4724, saw a larger rating boost of +82.

Friend 1 possesses a superior ranking and a lower overall rating compared to friend 2; however, it is puzzling how friend 2 managed to achieve a more substantial rating increase than friend 1.