Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:67:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(father == -1) ^ user.cpp: In function ‘void getInt(int&)’: user.cpp:25:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, lim ,stdin); ^ user.cpp:31:37: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1,lim,stdin); ^