/in/foo.cc:1:0: warning: ignoring #pragma comment  [-Wunknown-pragmas]
 #pragma comment(linker, "/STACK:102400000,102400000")
 
/in/foo.cc: In function 'int dfs(int)':
/in/foo.cc:17:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j;
      ^
/in/foo.cc:17:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^