View Compilation Error

0_0_36207065_11085.cpp:124:34: error: 'get_mcmf' function uses 'auto' type specifier without trailing return type
     auto get_mcmf(int s=S,int t=T)
                                  ^
0_0_36207065_11085.cpp:124:34: note: deduced return type only available with -std=c++1y or -std=gnu++1y