/in/foo.c: In function 'main':
/in/foo.c:11:15: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long int *' [-Wformat=]
       scanf("%d%d",&x,&y);
              ~^    ~~
              %ld
/in/foo.c:11:17: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'long int *' [-Wformat=]
       scanf("%d%d",&x,&y);
                ~^     ~~
                %ld
/in/foo.c:8:7: warning: variable 'a' set but not used [-Wunused-but-set-variable]
  long a[5000];
       ^