i think 212 in the Example test is wrong cause we have 2 remix of "I miss you" when the most remix that we can reach is 1 .

Edited by author 21.01.2018 23:56

It says: "in a row". It means that there can be any number of remixes of each song, the most important part it that the number in each row doesn't;t have to exceed a for 1st and b for 2nd