Compilare: user.cpp: In function ‘void DFS(std::stack<int>&)’: user.cpp:88:40: 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:179:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v_minim.size() >= n - 1) ^ user.cpp:188:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v_minim.size(); i++) ^ user.cpp:222:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ciclu.size(); i++) ^ user.cpp:224:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < ciclu.size(); j++) ^ user.cpp:229:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int z = 0; z < v_minim.size(); z++) ^ user.cpp:244:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v_minim.size(); i++) ^ user.cpp:144:25: warning: unused variable ‘nr’ [-Wunused-variable] int m, cost_total = 0, nr = 0, ok = 1; ^