foo.c: In function 'main':
foo.c:20:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=0;i<c3;i++)
  ^~~
foo.c:22:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   printf("\n");
   ^~~~~~
foo.c: In function 'f':
foo.c:36:2: warning: statement with no effect [-Wunused-value]
  for(i;i<m+n;i++)
  ^~~
foo.c: In function 'SetInter':
foo.c:66:2: warning: statement with no effect [-Wunused-value]
  for(i;i<m+n;i++)
  ^~~
foo.c: In function 'main':
foo.c:9:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n1,&n2,&n3);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:11:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a1[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:13:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a2[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:15:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a3[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c: In function 'f':
foo.c:55:9: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return cnt;
         ^~~
foo.c: In function 'SetInter':
foo.c:86:10: warning: array subscript is above array bounds [-Warray-bounds]
  return d[10000];
         ~^~~~~~~

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