/in/foo.cc: In function 'void myfind(int)':
/in/foo.cc:28:20: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ans=ans<(v+tsum)?v+tsum:ans;
                   ~^~~~~
/in/foo.cc: In function 'void dfs2(int, int)':
/in/foo.cc:28:20: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ans=ans<(v+tsum)?v+tsum:ans;
                   ~^~~~~
/in/foo.cc:17:6: note: 'v' was declared here
  int v;
      ^