foo.cc: In function 'int main()':
foo.cc:25:29: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized]
   25 |         cout << x << " " << y;
      |                             ^
foo.cc:13:16: note: 'y' was declared here
   13 |         int x, y;
      |                ^

[Hydro](https://hydro.ac)提供评测服务