Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:54:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[v].size(); j++) ^ user.cpp:65:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[0].size(); j++) ^ user.cpp:86:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Sol.size(); i++) ^ user.cpp:89:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < Sol[i].size(); j++) ^