Ответсообщение недоступно
num = int(input())
n_1 = num // 100
n_2 = num // 10 % 10
n_3 = num % 10
if n_1 > n_2 and n_1 > n_3:
max_n = n_1
elif n_2 > n_1 and n_2 > n_3:
max_n = n_2
else:
max_n = n_3
if (n_1 > n_2 and n_1 < n_3) or (n_1 < n_2 and n_1 > n_3):
ave_n = n_1
elif (n_2 > n_1 and n_2 < n_3) or (n_2 < n_1 and n_2 > n_3):
ave_n = n_2
else:
ave_n = n_3
if n_1 < n_2 and n_1 < n_3:
min_n = n_1
elif n_2 < n_1 and n_2 < n_3:
min_n = n_2
else:
min_n = n_3
summ = int(min_n + max_n)
mult = int(ave_n * 2)
if summ == mult:
print('YES')
else:
print('NO')