foo.cc: In function 'int dfs(int)':
foo.cc:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<v[u].size();i++)
      |                 ~^~~~~~~~~~~~
foo.cc:59:1: warning: no return statement in function returning non-void [-Wreturn-type]
   59 | }
      | ^
foo.cc: In function 'int main()':
foo.cc:68:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |         scanf("%d%d%d",&u,&t,&w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Found 10 testcases.
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