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View Compilation Error

0_0_30171435_14368.cpp
0_0_30171435_14368.cpp(21) : error C2275: “xy”: 将此类型用作表达式非法
0_0_30171435_14368.cpp(21) : error C2228: “.step”的左边必须有类/结构/联合
0_0_30171435_14368.cpp(40) : error C2039: “front”: 不是“std::priority_queue<xy,std::vector<_Ty,std::allocator<_Ty>>,std::less<_Ty>>”的成员
        with
        [
            _Ty=xy
        ]


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