scor2.cpp: In function 'void dfs(int)': scor2.cpp:33: warning: comparison between signed and unsigned integer expressions scor2.cpp: In function 'int main()': scor2.cpp:122: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:122: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:123: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:123: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:127: warning: comparison between signed and unsigned integer expressions scor2.cpp:141: warning: comparison between signed and unsigned integer expressions scor2.cpp:142: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:142: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x scor2.cpp:146: warning: comparison between signed and unsigned integer expressions