Compilare: user.cpp: In function ‘int main()’: user.cpp:43:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p=0; p<c[j].size(); p++) ^ user.cpp:48:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p=0; p<c[poz].size(); p++) ^ user.cpp:56:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(p=2; p<=c[k].size(); p++) ^