Compilare: main.cpp: In function 'void conex(int)': main.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=0;i<v[k].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(j=0;j<c[i].size();j++) | ~^~~~~~~~~~~~