n, m, c = map(int, input().split())

x = (c - 1) // m + 1
y = (c - 1) % m + 1

is_corner = (x == 1 or x == n) and (y == 1 or y == m)

if n == 1 or m == 1:
    print("YES")
elif n == 2 and m == 2:
    print("NO")
else:
    if is_corner:
        if n % 2 == 1 and m % 2 == 1:
            print("NO")
        else:
            print("YES")
    else:
        print("YES")