class task time
1 1 43.2
2 1 48.3
3 1 56.6
4 1 72
5 1 88
1 2 45.8
2 2 48.7
3 2 56.1
4 2 74.1
5 2 88.6
1 3 45.4
2 3 46.9
3 3 55.3
4 3 89.5
5 3 91.5
1 4 44.7
2 4 48.8
3 4 54.6
4 4 82.7
5 4 88.2