Compilare: main.cpp: In function 'void Euler(int)': main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<elem>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0;i<G[node].size();i++){ | ~^~~~~~~~~~~~~~~ main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<elem>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int j=0;j<G[next].size();j++) | ~^~~~~~~~~~~~~~~