#include<stdio.h>
#include<stdlib.h>
int main()
{
	int b,i,cnt=0,s,t,j=0;
	int* a;
	scanf("%d",&i);
	a=(int*)malloc(sizeof(int)*(i+1));
	for(b=1;b<=i;b++){
		scanf(" %d",&a[b]);
	}
	do{
		s=0;
		for(b=1;b<i;b++){
			if(a[b]>a[b+1]){
				break;
			}else if(b==i-1){
				j=-1;
			}
		}
		if(j!=-1){
			for(b=2;b<=i;b++){
				if(a[b]<=a[1]&&a[b]>=s){
					s=a[b];
					t=b;
				}
			}
			for(b=t;b>1;b--){
				a[t]=a[t-1];
			}
			a[1]=s;
			cnt++;
		}
	}while(j!=-1);
	free(a);
	printf("%d",cnt);
	return 0;
}