Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[node].size(); i++) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < sol[i].size(); j++) { ~~^~~~~~~~~~~~~~~