Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:20:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (aux != f) ^ user.cpp: In function ‘int main()’: user.cpp:31:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("comoditate.in", "r", stdin); ^ user.cpp:32:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("comoditate.out", "w", stdout); ^