0_0_27630434_12013.cpp 0_0_27630434_12013.cpp(55) : error C3861: “__gcd”: 找不到标识符 0_0_27630434_12013.cpp(77) : error C3861: “__builtin_popcount”: 找不到标识符 0_0_27630434_12013.cpp(81) : error C3861: “__gcd”: 找不到标识符