Eroare de compilare: user.cpp: In function ‘void citire()’: user.cpp:16: error: ‘scanf’ was not declared in this scope user.cpp: In function ‘void dfs(int)’: user.cpp:28: error: ‘printf’ was not declared in this scope user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:40: error: ‘stdin’ was not declared in this scope user.cpp:40: error: ‘freopen’ was not declared in this scope user.cpp:41: error: ‘stdout’ was not declared in this scope