foo.c: In function 'main':
foo.c:8:2: error: expected ';' before 'scanf'
  scanf("%d",&p);
  ^~~~~
foo.c:16:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("Yes\n",p);
          ^~~~~~~
foo.c:18:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("No\n",p);
          ^~~~~~

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