package chelper;

import io.InputReader;
import io.OutputWriter;

public class TaskA {
  public void solve(int testNumber, InputReader in, OutputWriter out) {
    int n = in.nextInt();
    String s = in.nextString();

    int c = 0;

    for (int i = 0; i < n; i++) {
      if (s.charAt(i) == '<') {
        c++;
      } else {
        break;
      }
    }

    for (int i = 0; i < n; i++) {
      if (s.charAt(n - i - 1) == '>') {
        c++;
      } else {
        break;
      }
    }

    out.println(c);
  }
}