/in/foo.cc: In function 'int main()':
/in/foo.cc:12:6: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
      if(h+30>=a[i])
      ^~
/in/foo.cc:14:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   cout<<cnt;      
   ^~~~
/in/foo.cc:12:18: warning: array subscript is above array bounds [-Warray-bounds]
      if(h+30>=a[i])
               ~~~^