foo.c: In function 'F':
foo.c:5:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
    5 |   if(i%100==0)
      |     ^
foo.c:10:1: warning: control reaches end of non-void function [-Wreturn-type]
   10 | }
      | ^
foo.c: In function 'main':
foo.c:14:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |  scanf("%d%d%d",&i,&j,&k);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~

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