import sys

MAX = 100
cur = MAX
sumB = 0
fn = False

while (not fn) and cur > 10:
    nxt = (cur + 1) // 2

    print(f"? 1 {nxt}", flush=True)
    res = input().strip()

    if res == ">":
        sumB += nxt
    elif res == "=":
        sumB += nxt
        fn = True

    cur = nxt

if (not fn) and cur > 0:
    for i in range(cur, 0, -1):
        print(f"? 1 {i}", flush=True)
        c = input().strip()

        if c == ">":
            sumB += i
        elif c == "=":
            sumB += i
            break

print(f"! {sumB}", flush=True)