Compilare: user.cpp: In function ‘int main()’: user.cpp:79:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[nod].size();i++) ^ user.cpp:80:10: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(timp<w&&dist[G[nod][i].nod]>dist[nod]+1) ^ user.cpp: In function ‘char nextch()’: user.cpp:19:31: 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,MAXBUF,fi); ^