import sys

def solve():
    N, M, C = map(int, input().split())
    if N > M:
        N, M = M, N
    if (N == 1 and M != 2) or (N * M) % 2:
        print('NO')
    else:
        print('YES')

def debug(x, table):
    for name, val in table.items():
        if x is val:
            print('DEBUG:{} -> {}'.format(name, val), file=sys.stderr)
            return None

if __name__ == '__main__':
    solve()