apm.cpp: In function 'int main()': apm.cpp:34: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x apm.cpp:34: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x apm.cpp:35: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x apm.cpp:35: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x apm.cpp:48: warning: comparison between signed and unsigned integer expressions apm.cpp: In function 'void DFS(int, int)': apm.cpp:81: warning: comparison between signed and unsigned integer expressions