View Compilation Error

0_0_38553761_26423.cpp:62:10: error: 'in' function uses 'auto' type specifier without trailing return type
 auto& in() { return (std::cin); }
          ^
0_0_38553761_26423.cpp:62:10: note: deduced return type only available with -std=c++1y or -std=gnu++1y
0_0_38553761_26423.cpp:64:33: error: 'in' function uses 'auto' type specifier without trailing return type
 auto& in(T& first, Args&... args) { std::cin >> first; return in(args...); }
                                 ^
0_0_38553761_26423.cpp:64:33: note: deduced return type only available with -std=c++1y or -std=gnu++1y