foo.cc: In function 'int main()':
foo.cc:13:29: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized]
   13 |                 if(a[i]==b[i])
      |                          ~~~^
foo.cc:6:18: note: 'b' declared here
    6 |     int n,a[101],b[101];
      |                  ^

[Hydro](https://hydro.ac)提供评测服务