Compilare: main.cpp: In function 'int pairup(int)': main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int x=0; x<v[nod].size(); ++x) | ~^~~~~~~~~~~~~~ main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int x=0; x<v[nod].size(); ++x) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void suport(int)': main.cpp:56:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int i=0; i<v[nod].size(); i++) | ~^~~~~~~~~~~~~~