Compilare: user.cpp: In function ‘void hashInsert(const int&)’: user.cpp:132:9: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] H[x & Lch].push_back(x); ^ user.cpp: In function ‘int hashFind(const int&)’: user.cpp:137:17: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] int key = x & Lch; ^ user.cpp:140:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < H[key].size(); i ++) ^ user.cpp: In function ‘void hashErase(const int&)’: user.cpp:152:17: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] int key = x & Lch; ^ user.cpp:154:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < H[key].size(); i ++) ^ user.cpp: In function ‘void DFS(const int&, const int&)’: user.cpp:171:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:21:39: 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, 65536, fin); ^