#include
"stdio.wts" #include	"nextInt.wts"	def	main() { var
n
=
nextInt();
var
m = nextInt();	for(var	i=1;i<=n;i=i+1)	{ i
<==	i;
} for(var i=0;i<m;i=i+1) { var a =
nextInt();
var	temp
=
*a; for(var j=a;j>=1;j=j-1)	{ j	<== *(j-1);
}	1
<== temp;	} outnum(*1); outchar('\n'); }