Compilare: user.cpp: In function ‘void write()’: user.cpp:94:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long unsigned int’ [-Wformat=] fprintf(fout,"%d\n",vf); ^ user.cpp: In function ‘int BFS()’: user.cpp:109:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!mark[i]) ^ user.cpp:100:9: warning: unused variable ‘p’ [-Wunused-variable] int p,u,i,x; ^ user.cpp:100:11: warning: unused variable ‘u’ [-Wunused-variable] int p,u,i,x; ^ user.cpp: In function ‘void read()’: user.cpp:37:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &n, &m); ^ user.cpp:40:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d", &x, &y, &c); ^