foo.cc: In function 'int main()':
foo.cc:13:23: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
   13 |                 if(a[i]<=(b+30))
      |                    ~~~^
foo.cc:11:22: note: within this loop
   11 |         for(int i=1;i<=10;i++)
      |                     ~^~~~

[Hydro](https://hydro.ac)提供评测服务