what is the output of this program

	#include <stdio.h>
	void f(int (*x)(int));
	int myfoo(int i);
	int (*foo)(int) = myfoo;
	int main()
	{
	f(foo(10));
	}
	void f(int (*i)(int))
	{
	i(11);
	}
	int myfoo(int i)
	{
	printf("%d\n", i);
	return i;
	}

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output
10 segmentation fault

explanation