Compilare: user.cpp: In function ‘void DFS(std::stack<int>&)’: user.cpp:86:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < vecini[top].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:176:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v_minim.size() >= n - 1) ^ user.cpp:211:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v_minim.size(); i++) ^ user.cpp:239:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v_minim.size(); i++) ^ user.cpp:261:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v_minim.size() >= n - 1) ^ user.cpp:143:25: warning: unused variable ‘nr’ [-Wunused-variable] int m, cost_total = 0, nr = 0, ok = 1; ^