/in/foo.c: In function 'main':
/in/foo.c:9:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
  printf("%d\n",y1);
           ^
/in/foo.c:10:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
  printf("%d\n",y2);
           ^
/in/foo.c:11:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
  printf("%d\n",y3);
           ^