Compilare: main.cpp: In function 'void dfs(int)': main.cpp:12:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i=0; i<l1[nod].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int j = 0; j < l1[t[i]].size(); j++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:68:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int j=0; j<l2[t[i]].size(); j++) | ~^~~~~~~~~~~~~~~~