-9,-7,-5,-3,2,4,6,8,10之和=6,
4个负奇数分别放在3行里,至少有一行有两个奇数,不妨设第一行有两个奇数,因偶数
2,-3,4,-5,6,-7,8,-9,10填入九宫格每行,每列,每个对角的和都是正数
2,-3,4,-5,6,-7,8,-9,10填入九宫格每行,每列,每个对角的和都是正数
数学人气：200 ℃时间：2019-10-23 08:48:11
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