dag.cpp: In function 'int main()': dag.cpp:38: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x dag.cpp:38: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x dag.cpp:53: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x dag.cpp:53: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x