C++,Harry up! There are a few minutes just!

A number of participants took a part in a contest, each got a score in the first round (the score will represented by a letter A,B....,F). Depending on the following contest role calculate the number of participants who will win this round and who will not win. The Contest rule: "Contestant who earns a score equal to or greater than a given score will win the round" Hint1: Score of A>B>C>D>E>F. Hint2: Ascii number of A