Compilare: main.cpp: In function 'int main()': main.cpp:45:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i = 0; i < g[curr_node].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:63:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (int i = 0; i < g[curr_node].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:93:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | for (int i = 0; i < ans.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:41:9: warning: unused variable 'ok' [-Wunused-variable] 41 | int ok = 0; | ^~