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2026-07-18 07:28:54
平均绩点
Time Limit:
1000ms
Memory Limit:
32768KB
64-bit integer IO format:
%lld
Java class name:
Main
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Description
每门课的成绩分为A、B、C、D、F五个等级,为了计算平均绩点,规定A、B、C、D、F分别代表4分、3分、2分、1分、0分。
Input
有多组测试样例。每组输入数据占一行,由一个或多个大写字母组成,字母之间由空格分隔。
Output
每组输出结果占一行。如果输入的大写字母都在集合{A,B,C,D,F}中,则输出对应的平均绩点,结果保留两位小数。否则,输出“Unknown”。
Sample Input
A B C D F B F F C C A D C E F
Sample Output
2.00 1.83 Unknown
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