/in/foo.cc:1:0: warning: ignoring #pragma G  [-Wunknown-pragmas]
 #pragma G++ optimize (2)
 
/in/foo.cc: In function 'bool check(int)':
/in/foo.cc:42:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
         while (b[p]-b[now]<=x+1 && p<=cnt) p++; p--;
         ^~~~~
/in/foo.cc:42:49: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
         while (b[p]-b[now]<=x+1 && p<=cnt) p++; p--;
                                                 ^