#!/bin/python3

fibs = []
class Memoize:
     def __init__(self, fn):
         self.fn = fn
         self.memo = {}
     def __call__(self, arg):
        if arg not in self.memo:
            self.memo[arg] = self.fn(arg)
        return self.memo[arg]

@Memoize
def fib(n):
    a,b = 1,1
    for i in range(n-1):
        a,b = b,a+b
    return a

fibs = []
for i in range(1001):
    fibs.append(fib(i))
n, k, x = [int(x) for x in input().split()]
print(fibs[n])