foo.cc: In function 'int main()':
foo.cc:42:32: warning: 'ans2' may be used uninitialized [-Wmaybe-uninitialized]
   42 |         cout << ans1 << ' ' << ans2;
      |                                ^~~~
foo.cc:18:33: note: 'ans2' was declared here
   18 |         int ans1 = a[n - 1];int ans2;
      |                                 ^~~~

[Hydro](https://hydro.ac)提供评测服务