Easy Problem

n, x, y = map(int, input().split())

l = 0
r = min(x, y) * n

while r - l > 1:
    mid = l + (r - l) // 2
    if 1 + (mid - min(x, y)) // x + (mid - min(x, y)) // y < n:
        l = mid
    else:
        r = mid

print(r)