windows.cpp: In function 'int dfs(int)': windows.cpp:15: warning: comparison between signed and unsigned integer expressions windows.cpp: In function 'int main()': windows.cpp:47: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x windows.cpp:47: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x windows.cpp:35: warning: unused variable 'm' windows.cpp:35: warning: unused variable 'k' windows.cpp:35: warning: unused variable 't' windows.cpp:35: warning: unused variable 'q' windows.cpp:35: warning: unused variable 'nr' windows.cpp:35: warning: unused variable 'minim' windows.cpp:35: warning: unused variable 'maxim'