foo.cc: In function ‘void dfs(int, int)’:
foo.cc:9:22: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
    9 |         for(int i=0;i<g[x].size();i++)
      |                     ~^~~~~~~~~~~~
foo.cc: In function ‘bool dfs2(int, int)’:
foo.cc:17:22: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   17 |         for(int i=0;i<g[x].size();i++)
      |                     ~^~~~~~~~~~~~

正在同步测试数据，请稍后