foo.cc: In function ‘void toposort()’:
foo.cc:92:34: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   92 |                 for(int i = 0; i < out[u].size(); i ++) {
      |                                ~~^~~~~~~~~~~~~~~
foo.cc: In function ‘int main()’:
foo.cc:141:42: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
  141 |                         for(int k = 0; k < out[u].size(); k ++) {
      |                                        ~~^~~~~~~~~~~~~~~

正在同步测试数据，请稍后