Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:15:21: 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:102:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Sol.size(); i++) ~~^~~~~~~~~~~~ user.cpp:107:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Sol.size(); i++) ~~^~~~~~~~~~~~ user.cpp:109:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < Sol.size(); j++) ~~^~~~~~~~~~~~