import bisect,collections,copy,heapq,itertools,math,string,sys,queue,time,random
input = lambda: sys.stdin.readline().rstrip()
def I(): return input()
def IS(): return input().split()
def II(): return int(input())
def IIS(): return map(int,input().split())
def LIIS(): return list(map(int,input().split()))
def Base_n_to_10(X,n):
    out = 0
    for i in range(1,len(str(X))+1):
        out += int(X[-i])*(n**(i-1))
    return out#int out
def Base_10_to_n(X, n):
    if (X//n):
        return Base_10_to_n(X//n, n)+str(X%n)
    return str(X%n)
INF=10**18
MOD=10**9+7
sys.setrecursionlimit(10**8)
##############################################################################
n=II()
if 10<=n<=99:
    print("Yes")
else:
    print("No")