foo.c: In function 'main':
foo.c:17:41: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long int *' [-Wformat=]
   17 |                                 scanf("%d",&v[ii]);
      |                                        ~^  ~~~~~~
      |                                         |  |
      |                                         |  long int *
      |                                         int *
      |                                        %ld
foo.c:8:5: warning: iteration 2000 invokes undefined behavior [-Waggressive-loop-optimizations]
    8 | x[i]=0;
      | ~~~~^~
foo.c:7:14: note: within this loop
    7 | for(int i=1;i<=2001;i++)
      |             ~^~~~~~
foo.c:8:5: warning: '__builtin_memset' forming offset [8004, 8007] is out of the bounds [0, 8004] of object 'x' with type 'int[2001]' [-Warray-bounds]
    8 | x[i]=0;
      | ~~~~^~
foo.c:6:5: note: 'x' declared here
    6 | int x[2001];
      |     ^

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