Compilare: user.cpp: In function ‘int solve()’: user.cpp:74:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < p[i].size(); ++j) ^ user.cpp:77:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < p[i - DX - 1].size(); ++j) ^ user.cpp:85:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < p[i].size(); ++j) ^ user.cpp:88:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < p[i + DX + 1].size(); ++j) ^