flood.cpp: In function 'void ufds()': flood.cpp:72: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x flood.cpp:72: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x flood.cpp:75: warning: comparison between signed and unsigned integer expressions flood.cpp:85: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x flood.cpp:85: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x flood.cpp:90: warning: comparison between signed and unsigned integer expressions