Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:71:35: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘std::vector<int>::size_type {aka long unsigned int}’ [-Wformat=] fprintf(g,"%d\n",critic.size()); ^ user.cpp: In function ‘void read()’: user.cpp:19:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d",&n,&m,&x,&y); ^ user.cpp:23:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&r1,&r2); ^