Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<g[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'bool eulerian(int, int)': main.cpp:60:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (int i = 0; i < ans.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:92:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int i=0;i<ans.size();i++) | ~^~~~~~~~~~~