Compilare: main.cpp: In function 'void dfs(int)': main.cpp:36:9: warning: unused variable 'val' [-Wunused-variable] 36 | int val = vsons[node].size(); | ^~~ main.cpp:29:7: warning: unused variable 'i' [-Wunused-variable] 29 | int i; | ^ main.cpp:30:8: warning: unused variable 'ok' [-Wunused-variable] 30 | bool ok; | ^~ main.cpp:31:7: warning: variable 'a' set but not used [-Wunused-but-set-variable] 31 | int a; | ^ main.cpp: In function 'int main()': main.cpp:67:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 67 | if (vcycle.size() == m) { | ~~~~~~~~~~~~~~^~~~