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View Compilation Error

0_0_6539326_16769.cpp
0_0_6539326_16769.cpp(74) : error C2446: “:” : 没有从“std::_Tree<_Traits>::_Pairib”到“int”的转换
        with
        [
            _Traits=std::_Tmap_traits<int,int,std::less<int>,std::allocator<std::pair<const int,int>>,false>
        ]
        没有可用于执行该转换的用户定义的转换运算符,或者无法调用该运算符


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