asm("mark\soutchar;outchar;push\s0;return"); asm("mark\soutnum;outnum;push\s0;return"); asm("mark\sreadchar;push\s0;dup;readchar;retrieve;return"); asm("mark\sreadnum;push\s0;dup;readnum;retrieve;return");	asm("mark\snextInt;push\s0;mark\snextIntloop;push\s0;dup;readchar;retrieve;push\s48;sub;dup;jneg\snextIntend;dup;push\s9;swap;sub;jneg\snextIntend;swap;push\s10;mul;add;jump\snextIntloop;mark\snextIntend;disc;return"); var n;
var m; var i2;	var
target	=	1; def
main() {	n	<==	nextInt();
m
<==
nextInt();
for(i2
<== 0; *i2	< *m;	i2 <==	*i2
+	1)
{ PUSH(nextInt()); } for(i2 <== 0; *i2
<
*m;	i2
<==
*i2 + 1)	{	var p =
POP();	if(*target
> p)	{ continue; } if (*target
==
1)	{
target
<== p; }else{	target	<== *target	-	1;
} } outnum(*target); outchar('\n'); }
def PUSH(n)
{ asm("push\s0;return");	}
def	POP() {	asm("return");	}