问题描述：
问题解答：
C,1650,543
C,570,735
C,924,799
B,2768,559
B,2384,831
B,2896,1215
B,368,799
D,1247,1215
A,2896,1472,L
A,848,800
C,1895,1471
A,624,1472
A,1292,1151
C,796,1215
C,1155,895
D,1680,543
D,1624,543
C,1933,703
D,1736,1023
D,2029,959
C,2831,1215
E,300,2900
我没那么牛
。。。。。一楼的。。
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