candy = input()
x = candy.split()
y = [0,0,0]
for i in range(3):
    y[i] = int(x[i])
i = 0
for v in y:
    if max(y) == v and y[(i+1)%3] + y[(i+2)%3] == v:
            print('YES')
            break
    i = i+1
if i >= 3:
    print('NO')