Making the Grade            Test case to be used for judging


The following input:

3
10  4
79   56   59   89    4    5
100   89   96   79    6    2
80   80   80   76    1    3
76   76   76   76    5    4
58   78   67   75    4    0
100   96  100   95    1    2
47   49   46   45    0    5
67   98   59   87    5    5
23   45   52   54    2    7
78   75   79   79    3    3
4  2
100  100   0  1
100  60   0  1
60  60  0  1
80  0  0  1
9  4
55   56   59   89    4    5
100   89   96   54    6    2
80  100   80   76    1    3
76   76   76   76   20    4
58   78   67   75    4    0
100   23   55   95    1    2
67   98   59   87    5   12
20  100  100  100    2    7
100  100  100   86    3    3


should produce the following output:

MAKING THE GRADE OUTPUT
2.4
2.5
2.4
END OF OUTPUT