#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd(v) long v=0;{long _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}
#define wt(v) {ulong _z=v;do*--wp=_z%10+48;while(_z/=10);}

typedef unsigned long ulong;

int main(){
	char*mmap();
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	rd(n);
	long a=1,b=0,c=1,i=1;
	while(1){
		rd(r);
		if(r==n){
			char wbuf[64],*wp=wbuf+sizeof wbuf;
			wt(c);
			write(1,wp,wbuf+sizeof wbuf-wp);
			_exit(0);
		}
		if(b<r){
			b=r;
		}
		if(i==a){
			a=b;
			c+=1;
		}
		i+=1;
	}
}