foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &le);
  ^~~~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &t);
   ^~~~~~~~~~~~~~~
foo.c:23:20: warning: iteration 1001 invokes undefined behavior [-Waggressive-loop-optimizations]
   for (j = 0; j < a[i]; j++)
                   ~^~~
foo.c:21:2: note: within this loop
  for (i = 0; i <= 1001; i++)
  ^~~

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