Compilare: main.cpp: In function 'void df(int)': main.cpp:19:20: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 19 | if(edges.size()==n) | ~~~~~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:66:7: warning: 'random' may be used uninitialized in this function [-Wmaybe-uninitialized] 66 | df(random); | ~~^~~~~~~~