foo.c:3:6: warning: return type of 'main' is not 'int' [-Wmain]
    3 | void main()
      |      ^~~~
foo.c: In function 'main':
foo.c:15:12: warning: too many arguments for format [-Wformat-extra-args]
   15 |     printf("Yes\n",s);
      |            ^~~~~~~
foo.c:18:16: warning: too many arguments for format [-Wformat-extra-args]
   18 |         printf("No",s);
      |                ^~~~

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