#!/usr/bin/env python
# -*- coding: utf-8 -*-
import random
def main():
    x = 0
    y = 99
    number = input()
    while True:
        another = random.randint(x, y)
        print (another)
        if int(number) != another:
            z = input('< or >')
            if z == '<':
                x = another
            else:
                y = another
        else:
            print ("OK!")            
            return 0
if __name__ == '__main__':
    main()