Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:62:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); ++i) ^ user.cpp: In function ‘char getChar()’: user.cpp:23:35: 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, f); ^