Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:26:36: error: ‘modul’ was not declared in this scope int dif=modul(a[j]-a[i]), r=dif%mod, sz=H[r].size(); ^ user.cpp:28:28: error: ‘sz’ was not declared in this scope for(int i=0; i<sz; ++i) ^ user.cpp:29:22: error: ‘r’ was not declared in this scope if(H[r][i]==dif) ok=0; ^ user.cpp:30:23: error: ‘r’ was not declared in this scope if (ok) H[r].push_back(dif), ++dim; ^