Compilare: user.cpp: In function ‘int main()’: user.cpp:34:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < result[i-1].size(); j++){ ^ user.cpp:56:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < indexes.size(); i++) ^