Compilare: user.cpp: In function ‘void Solve()’: user.cpp:65:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<noi.size(); ++j) ^ user.cpp:81:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<sl.size(); ++j) ^ user.cpp:53:12: warning: unused variable ‘jj’ [-Wunused-variable] int i, j, jj, Q, L1, C1, L2, C2; ^ user.cpp: In function ‘void Preprop(int)’: user.cpp:92:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, r; ^ user.cpp:92:12: warning: unused variable ‘r’ [-Wunused-variable] int i, j, r; ^