input_list = list(map(int,input().split()))
n, m = input_list

front2 = 0 % m
front1 = 1 % m
cur = None

for i in range(3, n + 1):
    cur = front2 + front1
    front2 = front1 % m
    front1 = cur % m
    
res = cur % m

print(res)