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//~ while (clock()<=69*CLOCKS_PER_SEC)
//~ #pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
//~ #pragma GCC optimize("Ofast")
//~ #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//~ #pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace __gnu_pbds;
using namespace std;

template <typename T>
using ordered_set =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
    *this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

#define shandom_ruffle random_shuffle

using ll=long long;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using vi=vector<int>;
using vll=vector<ll>;
const int nax=300*1007;
const int alfa=35;

int n;
ll tab[nax];

ll wyn;

vi wek, ter;

void zgarnij(ll v)
{
	ter.clear();
	while(v)
	{
		ter.push_back(v%10);
		v/=10;
	}
	reverse(ter.begin(), ter.end());
}

void wyczysc(int d, int k)
{
	for (int i=d; i<k && i-d<alfa; i++)
		wek[i]=0;
	for (int i=max(d, k-alfa); i<k; i++)
		wek[i]=0;
}

void dorzuc(int v)
{
	zgarnij(tab[v]);
	int d=ter.size();
	int k=wek.size();
	if (d>k)
	{
		wek=ter;
		return;
	}
	//0  -> rowne
	//-1 -> teraz mniejsze
	//1  -> teraz wieksze
	int por=0;
	for (int i=0; i<d; i++)
	{
		if (ter[i]!=wek[i])
		{
			if (ter[i]<wek[i])
				por=-1;
			else
				por=1;
			break;
		}
	}
	if (por==1)
	{
		for (int i=0; i<d; i++)
			wek[i]=ter[i];
		wyczysc(d, k);
		return;
	}
	if (por==-1)
	{
		for (int i=0; i<d; i++)
			wek[i]=ter[i];
		wyczysc(d, k);
		wek.push_back(0);
		return;
	}
	for (int i=k-1; 1; i--)
	{
		assert(i>=0);
		if (i<d)
		{
			wyczysc(d, k);
			wek.push_back(0);
			break;
		}
		wek[i]++;
		if (wek[i]<10)
			break;
		assert(wek[i]==10);
		wek[i]=0;
	}
}

int main()
{
	scanf("%d", &n);
	for (int i=1; i<=n; i++)
		scanf("%lld", &tab[i]);
	for (int i=1; i<=n; i++)
	{
		dorzuc(i);
		wyn+=(int)wek.size()-(int)ter.size();
	}
	printf("%lld\n", wyn);
	return 0;
}