Compilare: main.cpp: In function 'void dfs(int, int&)': main.cpp:59:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for ( int i = 0; i < vecini[nod].size(); ++i ) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int calcEnergy(std::string)': main.cpp:70:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for ( int i = 0; i < s.size(); ++i ) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for ( j = 0; j < c.size(); ++j ) | ~~^~~~~~~~~~