/in/foo.cc: In function 'void DP()':
/in/foo.cc:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for(int i=0; i<E2[x].size(); i++) {
      |                      ~^~~~~~~~~~~~~
/in/foo.cc: In function 'void TARJAN(int)':
/in/foo.cc:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i=0; i<E1[x].size(); i++) {
      |                  ~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:78:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |         for(int j=0; j<E1[i].size(); j++) {
      |                      ~^~~~~~~~~~~~~