Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[x].size(); i++) { ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < w[x].size(); i++) { ^ user.cpp: In function ‘void getPath(int, int, std::vector<int>&)’: user.cpp:69:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[node].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:124:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol.size();j++) ^