Eroare de compilare: user.cpp: In function ‘void normalize()’: user.cpp:22: error: ‘sort’ was not declared in this scope user.cpp: In function ‘int query(int)’: user.cpp:42: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘void update(int, int)’: user.cpp:54: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp: In function ‘int main()’: user.cpp:94: error: ‘system’ was not declared in this scope