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View Compilation Error

0_0_32595227_22112.cpp: In function 'int main()':
0_0_32595227_22112.cpp:35:34: error: call of overloaded 'stoi(std::basic_string<char>)' is ambiguous
         y = stoi(s.substr(0,k[0]));
                                  ^
0_0_32595227_22112.cpp:35:34: note: candidates are:
0_0_32595227_22112.cpp:10:5: note: int stoi(std::string)
 int stoi(string s);
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_32595227_22112.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2858:3: note: int std::stoi(const string&, std::size_t*, int)
   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
   ^
0_0_32595227_22112.cpp:36:39: error: call of overloaded 'stoi(std::basic_string<char>)' is ambiguous
         m = stoi(s.substr(k[0]+1,k[1]));
                                       ^
0_0_32595227_22112.cpp:36:39: note: candidates are:
0_0_32595227_22112.cpp:10:5: note: int stoi(std::string)
 int stoi(string s);
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_32595227_22112.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2858:3: note: int std::stoi(const string&, std::size_t*, int)
   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
   ^
0_0_32595227_22112.cpp:37:34: error: call of overloaded 'stoi(std::basic_string<char>)' is ambiguous
         d = stoi(s.substr(k[1]+1));
                                  ^
0_0_32595227_22112.cpp:37:34: note: candidates are:
0_0_32595227_22112.cpp:10:5: note: int stoi(std::string)
 int stoi(string s);
     ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/string:52:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/locale_classes.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_32595227_22112.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_string.h:2858:3: note: int std::stoi(const string&, std::size_t*, int)
   stoi(const string& __str, size_t* __idx = 0, int __base = 10)
   ^


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