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成绩转换

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 300154    Accepted Submission(s): 127680


Problem Description
输入一个百分制的成绩t,将其转换成对应的等级,具体转换规则如下:
90~100为A;
80~89为B;
70~79为C;
60~69为D;
0~59为E;
 

Input
输入数据有多组,每组占一行,由一个整数组成。
 

Output
对于每组输入数据,输出一行。如果输入数据不在0~100范围内,请输出一行:“Score is error!”。
 

Sample Input
56 67 100 123
 

Sample Output
E D A Score is error!
 

Author
lcy
 

Source
 

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