Eroare de compilare: user.cpp:1:18: error: cstdio : No such file or directory user.cpp:2:25: error: algorithm : No such file or directory user.cpp: In function ‘void insert(int)’: user.cpp:13: error: ‘swap’ was not declared in this scope user.cpp: In function ‘void del(int)’: user.cpp:35: error: ‘swap’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:48: error: ‘stdin’ was not declared in this scope user.cpp:48: error: ‘freopen’ was not declared in this scope user.cpp:50: error: ‘stdout’ was not declared in this scope user.cpp:52: error: ‘scanf’ was not declared in this scope user.cpp:105: error: ‘printf’ was not declared in this scope