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#include <iostream>
#include <math.h>

using namespace std;

int main()
{
	int64_t N;
	cin >> N;


	int64_t zerosBefore=0;
	int64_t prevNumber = 0;
	int64_t total = 0;

	for (int n = 0; n<N; n++)
	{
		int64_t a;
		cin >> a;

		int64_t digits = ceil(log10(a));
		int64_t digitsBefore = ceil(log10(prevNumber));

		int64_t prevTotalDigits = digitsBefore + zerosBefore;
		if (digits > prevTotalDigits)
		{
			prevNumber = a;
			zerosBefore = 0;
			continue;
		}
		else if (digits == prevTotalDigits)
		{
			int64_t prevTotalNumber = prevNumber * pow(10, zerosBefore);
			if (prevTotalNumber >= a)
			{
				total++;
				zerosBefore = 1;
				prevNumber = a;
				continue;
			}
			else
			{
				prevNumber = a;
				zerosBefore = 0;
				continue;
			}
		}
		else
		{
			if (prevNumber > a)
			{
				int64_t digitsDiff = digitsBefore - digits;
				int64_t number = a* pow(10, digitsDiff);
				if (number <= prevNumber)
				{
					total += prevTotalDigits-digits + 1;
					zerosBefore = prevTotalDigits-digits + 1;
					prevNumber = a;
					continue;
				}
				else
				{
					total += prevTotalDigits-digits;
					zerosBefore = prevTotalDigits-digits;
					prevNumber = a;
					continue;
				}
			}
			else if (prevNumber == a)
			{
				total += prevTotalDigits-digits + 1;
				zerosBefore = prevTotalDigits-digits + 1;
				prevNumber = a;
				continue;
			}
			else
			{
				int64_t digitsDiff = digits - digitsBefore;
				int64_t number = prevNumber * pow(10, digitsDiff);
				if (number >= a)
				{
					total += prevTotalDigits-digits + 1;
					zerosBefore = prevTotalDigits-digits + 1;
					prevNumber = a;
					continue;
				}
				else
				{
					total += prevTotalDigits-digits;
					zerosBefore = prevTotalDigits-digits;
					prevNumber = a;
					continue;
				}
			}
		}


	}

	cout << total << endl;

	return 0;
}