Compilare: main.cpp: In function 'int dfs(int)': main.cpp:13:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (int i = 0;i < e[node].size();i++) { | ~~^~~~~~~~~~~~~~~~ main.cpp:19:34: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 19 | while (st.size() > s) { | ~~~~~~~~~~^~~ main.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type] 32 | } | ^ main.cpp: In function 'int main()': main.cpp:50:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = 0;i < ans.size();i++) { | ~~^~~~~~~~~~~~