Example

Input

7
>>


Output

7
#include "iostream"
#include "climits"
#include "list"
#include "queue"
#include "stack"
#include "set"
#include "functional"
#include "algorithm"
#include "string"
#include "map"
#include "unordered_map"
#include "unordered_set"
#include "iomanip"
#include "cmath"
#include "random"
#include "bitset"
#include "cstdio"
#include "numeric"
#include "cassert"
#include "ctime"

using namespace std;

constexpr long long int MOD = 1000000007;
//constexpr int MOD = 1000000007;
//constexpr int MOD = 998244353;
//constexpr long long int MOD = 998244353;
constexpr double EPS = 1e-12;

//int N, M, K, T, H, W, L, R;
long long int N, M, K, T, H, W, L, R;



int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	cin >> N;
	string s;
	cin >> s;
	int l = -1, r = -1;
	for (int i = 0; i < N; i++) {
		if (s[i] == '>') {
			l = i;
			break;
		}
	}
	for (int i = 0; i < N; i++) {
		if (s[i] == '<') {
			r = i;
		}
	}
	if (l == -1 || r == -1) {
		cout << N << endl;
	}
	else if (l == 0 && r + 1 == N) {
		cout << N << endl;
	}
	else {
		cout << r - l + 1 + max(l, (int)N - 1 - r) << endl;
	}
}
