Compilare: main.cpp: In function 'void find_cicle(int)': main.cpp:18:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0 ; i < graph[node].size() && ok == 0; i++ ){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < graph[node].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:24: warning: unused variable 'val2' [-Wunused-variable] int val1 = d1[F1], val2 = d2[F1]; ^~~~