Compilare: user.cpp: In function ‘int Dijkstra()’: user.cpp:83:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i!=v[nod].size(); ++i) ^ user.cpp: In function ‘char getChar()’: user.cpp:21:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,BUF_SIZE,fr); ^