Compilare: user.cpp: In function ‘int main()’: user.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[i].size();j++){ ~^~~~~~~~~~~~ user.cpp:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<c[i].size();j++){ ~^~~~~~~~~~~~ user.cpp:50:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[val].size();j++){ ~^~~~~~~~~~~~~~ user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (t=0;t<c[vecin].size();t++) ~^~~~~~~~~~~~~~~~ user.cpp:68:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<L[i].size();j++){ ~^~~~~~~~~~~~ user.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (t=0;t<c[i].size();t++) ~^~~~~~~~~~~~