Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:28:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < g[node].size(); h++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:103:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1;i < spec.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:109:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~