Compilare: user.cpp: In function ‘void LantNou(int)’: user.cpp:76:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<a[i].size(); ++j) ^ user.cpp:97:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<a[x].size(); ++j) ^ user.cpp: In function ‘int Solve()’: user.cpp:140:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < a[i].size(); j++) ^ user.cpp:154:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < a[nod].size(); j++) ^