n, m = [int(i) for i in input().strip().split(" ")]

fib_base = [0 % m, 1 % m]
def fib(n):
    for i in range(2, n):
        fib_base.append((fib_base[i-1] + fib_base[i-2]) % m)

fib(n)
print(fib_base[-1])