Compilare: main.cpp: In function 'void dfs(int)': main.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(; poz[x]<nod[x].size(); poz[x]++){ | ~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:15: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 53 | if(st.size() != m + 1){ | ~~~~~~~~~~^~~~~~~~