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#include <cstdio>
#include <cmath>
#include <iostream>
#include <algorithm>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <cstring>
#include <cassert>
#include <limits.h>

using namespace std;

#define ST first
#define ND second
#define MP make_pair
#define PB push_back

typedef long long LL;
typedef long double LD;

typedef vector<int> VI;
typedef pair<int,int> PII;
#define REP(i,n) for(int i=0;i<(n);i++)
#define FOR(i,a,b) for(VAR(i,a);i<=(b);++i)
#define FORD(i,a,b) for(VAR(i,a);i>=(b);--i)
#define FORE(a,b) for(VAR(a,(b).begin());a!=(b).end();++a)
#define VAR(a,b) __typeof(b) a=(b)
#define SIZE(a) ((int)((a).size()))
#define ALL(x) (x).begin(),(x).end()
#define CLR(x,a) memset(x,a,sizeof(x))
#define ZERO(x) memset(x,0,sizeof(x))
#define S(t,i) scanf("%" ## t, &i)
#define SI(i) scanf("%d", &i)

const int INF=INT_MAX;
const int MAXN=1000+5;

int n;
long long int p, a;

inline int numberLength(long long int i) {
    if (i < 10) {
        return 1;
    } else if (i < 100) {
        return 2;
    } else if (i < 1000) {
        return 3;
    } else if (i < 10000) {
        return 4;
    } else if (i < 100000) {
        return 5;
    } else if (i < 1000000) {
        return 6;
    } else if (i < 10000000) {
        return 7;
    } else if (i < 100000000) {
        return 8;
    } else if (i < 1000000000) {
        return 9;
    }
    return 10;
}

long long int p10[] = {
    1,
    10,
    100,
    1000,
    10000,
    100000,
    1000000,
    10000000,
    100000000,
    1000000000,
    10000000000ll,
    100000000000ll,
    1000000000000ll,
    10000000000000ll,
    100000000000000ll,
    1000000000000000ll,
    10000000000000000ll,
    100000000000000000ll,
    1000000000000000000ll
};

int main() {
    ios_base::sync_with_stdio(0);
    SI(n);
    
    long long int result = 0;
    scanf("%lld", &p);
    int lp = numberLength(p);
    long long int trailing = 0;
    REP(i, n-1) {
        scanf("%lld", &a);
        if (a > p) {
            p = a;
            lp = numberLength(p);
        } else {
            int la = numberLength(a);
            long long int startp = p / p10[lp-la];
            if (startp < a) {
                p = a * p10[lp-la];
            } else if (startp > a) {
                if (lp > 16) {
                    trailing++;
                } else {
                    lp++;
                }
                p = a * p10[lp-la];
            } else {
                long long int r = p - startp * p10[lp-la];
                long long int r1 = r+1;
                if (r1 == p10[lp-la]) {
                    if (lp > 16) {
                        trailing++;
                    } else {
                        lp++;
                    }
                    p = (a * p10[lp-la]);
                } else {
                    p = (a * p10[lp-la]) + r1;
                }
            }
            result += lp-la + trailing;
        }
    }
    
    printf("%lld\n", result);
    
    return 0;
}