Compilare: main.cpp: In function 'void dfs(ll)': main.cpp:22:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int h = 0; h < g[node].size(); h++) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'bool check(ld)': main.cpp:55:8: warning: variable 'up' set but not used [-Wunused-but-set-variable] 55 | bool up = false, down = false; | ^~ main.cpp:55:20: warning: variable 'down' set but not used [-Wunused-but-set-variable] 55 | bool up = false, down = false; | ^~~~