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#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <string>
#include <bitset>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <algorithm>
#include <sstream>
#include <stack>
#include <iomanip>
using namespace std;
#define pb push_back
#define mp make_pair
typedef pair<int,int> pii;
typedef long long ll;
typedef double ld;
typedef vector<int> vi;
#define fi first
#define se second
#define fe first
#define FO(x) {freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);}
#define Edg int M=0,fst[SZ],vb[SZ],nxt[SZ];void ad_de(int a,int b){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;}void adde(int a,int b){ad_de(a,b);ad_de(b,a);}
#define Edgc int M=0,fst[SZ],vb[SZ],nxt[SZ],vc[SZ];void ad_de(int a,int b,int c){++M;nxt[M]=fst[a];fst[a]=M;vb[M]=b;vc[M]=c;}void adde(int a,int b,int c){ad_de(a,b,c);ad_de(b,a,c);}
#define es(x,e) (int e=fst[x];e;e=nxt[e])
#define esb(x,e,b) (int e=fst[x],b=vb[e];e;e=nxt[e],b=vb[e])
#define SZ 666666
int n,a[SZ];
int u; ll c,po[36];
void zip()
{
	if(c<po[17]) return;
	ll t=c,z=t%po[7];
	t/=po[7];
	while(t>=po[10]) t/=10,++u;
	c=t*po[7]+z;
}
int main()
{
	po[0]=1;
	for(int i=1;i<=35;++i)
		po[i]=po[i-1]*10;
	scanf("%d",&n);
	ll ans=0;
	for(int i=1;i<=n;++i)
	{
		scanf("%d",a+i);
		ll s=a[i]; int j; ans+=u;
		for(j=0;;++j,s*=10,++ans)
			if(s+po[j]-1>c) break;
		s+=max(c-s+1,ll(0));
		c=s; zip();
	}
	printf("%lld\n",ans);
}