Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<gf[nod].size(); ++i){ ^ user.cpp: In function ‘void next()’: user.cpp:24:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(S, 1, CIFMAX, stdin); poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:172:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disconnect.in", "r", stdin); ^