Compilare: user.cpp: In function ‘void init()’: user.cpp:13:12: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i] = dist[i] = 0; ^ user.cpp: In function ‘void bfs(int)’: user.cpp:25:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:41:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:43:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n1,&n2); ^