选择i, k(1≤i, k≤9)使1)1, 2, 7, 4, i, 5, 6, k, 9为偶排列:2) 1, i, 2, 5, k, 4, 8, 9, 7为奇排列.
选择i, k(1≤i, k≤9)使1)1, 2, 7, 4, i, 5, 6, k, 9为偶排列:2) 1, i, 2, 5, k, 4, 8, 9, 7为奇排列.
发布时间:2025-03-11 02:07:06
选择i, k(1≤i, k≤9)使1)1, 2, 7, 4, i, 5, 6, k, 9为偶排列:2) 1, i, 2, 5, k, 4, 8, 9, 7为奇排列.