Compilare: user.cpp: In function ‘std::pair<int, int> Solve(int)’: user.cpp:101:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < V[i].size(); j++) ^ user.cpp:91:25: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] pair <int, int> p = make_pair(x, Max2[f] + 1); ^ user.cpp: In function ‘void Solve()’: user.cpp:124:17: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int a; ^