Compilare: user.cpp: In function ‘void baga_negativ(int)’: user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<NEG[c].size();++it) ^ user.cpp: In function ‘void scot_negativ(int)’: user.cpp:58:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<NEG[c].size();++it) ^ user.cpp: In function ‘void baga_pozitiv(int)’: user.cpp:74:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<POZ[c].size();++it) ^ user.cpp: In function ‘void scot_pozitiv(int)’: user.cpp:86:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<POZ[c].size();++it) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:106:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<NEG[c].size();++it) ^ user.cpp:116:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<POZ[c].size();++it) ^ user.cpp:125:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it=0;it<v[nod].size();++it) ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:36:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:11:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^