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0_0_19774721_30857.cpp:2:1: error: stray '\272' in program
 sg函数
 ^
0_0_19774721_30857.cpp:2:1: error: stray '\257' in program
0_0_19774721_30857.cpp:2:1: error: stray '\312' in program
0_0_19774721_30857.cpp:2:1: error: stray '\375' in program
0_0_19774721_30857.cpp:12:1: error: stray '\241' in program
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 ^
0_0_19774721_30857.cpp:12:1: error: stray '\255' in program
0_0_19774721_30857.cpp:134:10: error: "DEL" is not a valid filename
 #8117935 DEL's solution for [HDU-3980] [Problem J]
          ^
0_0_19774721_30857.cpp:1:1: error: 'ST' does not name a type
 ST
 ^