Compilare: user.cpp: In function ‘void solve(std::vector<int>, int)’: user.cpp:48:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size(); ++i) ^ user.cpp:49:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < v.size(); ++j) ^ user.cpp:59:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < vp.size(); ++i) ^ user.cpp:60:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < vp.size(); ++j) ^