/in/foo.cc: In function 'int Find(int)':
/in/foo.cc:72:1: warning: control reaches end of non-void function [-Wreturn-type]
   72 | }
      | ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:122:11: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
  122 |     printf("%d\n",ans);
      |     ~~~~~~^~~~~~~~~~~~
/in/foo.cc:115:9: note: 'ans' was declared here
  115 |     int ans;
      |         ^~~