Untitled

#include <iostream>

int count(int n) {
	int sum = 0;
	int maxSum = 0;
	long long a;
	int i;
	for (i = 0; i < n; i++) {
		sum = 0;
		std::cin >> a;
		do {
			sum += 1;
			a /= 10;
		} while (a != 0);
		if (sum > maxSum) {
			maxSum = sum;
		}
	}
	return maxSum;
}
int main() {
	int n;

	std::cin >> n;
	std::cout << count(n);
}