what's the meaning of of the A,B,C... columns It's a ratio but of what over what ?

A, B, C... are the ID of the problems (not sorted by difficulty, teams have to figure out the order).

For each cell of (team, problem), the "ratio" x/y isn't actually a ratio. x means how many submissions were made. y is the minute when the accepted solution was submitted. For example, "3/298" means they made 3 submissions in total, and the accepted solution was submitted in the 298th minute (the contest lasted 300 minutes).

The penalty ("Time" column) is calculated as (sum of y) + 20 * (sum of (x-1)).

The columns are the questions. The score is “total att/solved”, (attempted/ solved?) though that doesn’t help much. I’m guessing you need to get the answer within the time limit.

https://worldfinals.icpc.global/scoreboard/2025/problems/A.p...

They're the problems with how many teams correctly solved it over the number of teams that attempted to solve it.