foo.cc: In function 'int main()':
foo.cc:60:8: warning: 'y' may be used uninitialized [-Wmaybe-uninitialized]
   60 |     DFS(0, x, y);
      |     ~~~^~~~~~~~~
foo.cc:43:12: note: 'y' was declared here
   43 |     int x, y;
      |            ^
foo.cc:60:8: warning: 'x' may be used uninitialized [-Wmaybe-uninitialized]
   60 |     DFS(0, x, y);
      |     ~~~^~~~~~~~~
foo.cc:43:9: note: 'x' was declared here
   43 |     int x, y;
      |         ^

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