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

if n == 1 or m == 1:
    if n == 1 and m == 1:
        print("NO")
    elif n == 1:
        if m % 2 == 1 and c == (m + 1) // 2:
            print("YES")
        else:
            print("NO")
    else:  # m == 1
        if n % 2 == 1 and c == (n + 1) // 2:
            print("YES")
        else:
            print("NO")
else:
    if n % 2 == 0 or m % 2 == 0:
        print("YES")
    else:
        print("NO")