Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:54:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (son.first != father) ^ user.cpp: In function ‘char Advance()’: user.cpp:21:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:65:41: 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:66:43: 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); ^