Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:28:5: error: ‘fin’ was not declared in this scope fin >> b; ^~~ user.cpp:52:5: error: ‘fout’ was not declared in this scope fout << sol << "\n"; ^~~~ user.cpp:63:28: error: expected ‘;’ before ‘)’ token for (pair<ui64, ui64> p) { ^ user.cpp:63:28: error: expected primary-expression before ‘)’ token user.cpp:63:28: error: expected ‘;’ before ‘)’ token