Compilare: main.cpp: In function 'int main()': main.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i=0;i<ans.size();i++) | ~^~~~~~~~~~~ main.cpp: In function 'void dfs1(int, int)': main.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(int i=0;i<g[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:69:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(int i=0;i<g[x].size();i++) | ~^~~~~~~~~~~~