Compilare: user.cpp: In function ‘int search(long long int)’: user.cpp:29:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < h[L].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:128:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); ++j) ^ user.cpp:145:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[x].size(); ++j) ^