Compilare: user.cpp: In function ‘void bfs()’: user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(size_t i=0;((i<dim) && (!viz[y]));i++) ^ user.cpp:28:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a>cur) ^ user.cpp: In function ‘int main()’: user.cpp:46:43: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 5 has type ‘long unsigned int*’ [-Wformat=] fscanf(in,"%hu %hu %ul\n",&a,&b,&d); ^ user.cpp:43:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%hu %hu %hu %hu\n",&n,&m,&x,&y); ^ user.cpp:46:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%hu %hu %ul\n",&a,&b,&d); ^