Compilare: main.cpp: In function 'void dfs(int)': main.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i = 0; i < graf[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:26:21: warning: pointer to a function used in arithmetic [-Wpointer-arith] 26 | dfs[next]; | ^ main.cpp:26:21: warning: value computed is not used [-Wunused-value] 26 | dfs[next]; | ~~~~~~~~^ main.cpp:26:21: warning: statement has no effect [-Wunused-value] main.cpp: In function 'int main()': main.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int i = 0; i < ans.size(); ++i) | ~~^~~~~~~~~~~~