Contest starts at 0 minutes and stops at 180 minute mark. Everybody starts at
0 minutes, which is the starting score.
If Albert solves problem A at 30 minutes into the contest, his compounded score is 0 + 30
If Albert solves problem B at 50 minutes into the contest, his compounded score is 30 + 50 = 80
If Albert submits problem C, but it has an error, score remains the same at 80. There is no penalty for unsolved problems.
If Albert submits problem C at 90 minutes, and it is correct, his score is then 80 (previous score) + 90 (time mark for when the problem was solved) + 20 (penalty for erroneous submission) = 190 (total compounded score)
At the end of the contest, the results are sorted by the number of problems solved, largest first, then by the compounded time score, smallest first. First three take the 1st, 2nd and 3rd places.