import sys
from functools import wraps
sys.setrecursionlimit(10000)

def tail_recursive(func):
    self_func = [func]
    self_firstcall = [True]
    self_CONTINUE = [object()]
    self_argskwd = [None]

    @wraps(func)
    def _tail_recursive(*args, **kwd):
        if self_firstcall[0] == True:
            func = self_func[0]
            CONTINUE = self_CONTINUE
            self_firstcall[0] = False
            try:
                while True:
                    result = func(*args, **kwd)
                    if result is CONTINUE:  # update arguments
                        args, kwd = self_argskwd[0]
                    else:  # last call
                        return result
            finally:
                self_firstcall[0] = True
        else:  # return the arguments of the tail call
            self_argskwd[0] = args, kwd
            return self_CONTINUE

    return _tail_recursive
@tail_recursive
def fibonacci(n,m, a=1, b=0):
    return b%m if n < 1 else fibonacci(n - 1, m,a + b, a)
n,m=map(int, input().split())
print(fibonacci(n-1,m)%m)