Compilare: main.cpp: In function 'void hierholzer(int)': main.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=0; i<graph[x].size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i=0; i<cycle.size()-1; i++) | ~^~~~~~~~~~~~~~~