/in/foo.cc: In function 'bool check(int)':
/in/foo.cc:9:7: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
       while (a[tmp]-a[pos]<mid&&tmp<=n)
       ^~~~~
/in/foo.cc:11:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
         pos =tmp--;
         ^~~