Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:49:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[q[b]].size();i++){ ^ user.cpp: In function ‘void Euler(int)’: user.cpp:64:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:138:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<V[b].size();i++) ^ user.cpp:156:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rez+pas<V[lca].size()&&V[lca][rez+pas]<=poz[b]) ^ user.cpp:161:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rez+pas<V[lca].size()&&V[lca][rez+pas]<=poz[c]) ^ user.cpp: In function ‘char nextch()’: user.cpp:13:30: 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); ^