supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:9:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
9 | for (int i = 0; i<p.size(); i++) {
| ~^~~~~~~~~
supertrees.cpp:10:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
10 | for (int j = 0; j<p.size(); j++) {
| ~^~~~~~~~~
supertrees.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type]
18 | }
| ^