Compilare: main.cpp: In function 'bool union_set(long long int, long long int)': main.cpp:29:1: warning: no return statement in function returning non-void [-Wreturn-type] 29 | } | ^ main.cpp: In function 'int main()': main.cpp:45:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (i=0;i<ans.size();i++){ | ~^~~~~~~~~~~