Compilare: user.cpp: In function ‘void BFS(int, int*)’: user.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[q[b]].size();i++) ^ user.cpp: In function ‘long long int DFS(int)’: user.cpp:43:28: 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:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[i].size();j++){ ^ user.cpp:57:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:59:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&x,&y,&c); ^