Python：每日一题 89
- 2017-11-27 14:44:00
- 六月
- 来源：
- http://bbs.fishc.com/thread-95708-1-1.html
- 转贴 645
- [1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484, 529, 576, 625, 676, 729, 784, 841, 900, 961, 1024, 1089, 1156, 1225, 1296, 1369, 1444, 1521, 1600, 1681, 1764, 1849, 1936, 2025, 2116, 2209, 2304, 2401, 2500, 2601, 2704, 2809, 2916, 3025, 3136, 3249, 3364, 3481, 3600, 3721, 3844, 3969, 4096, 4225, 4356, 4489, 4624, 4761, 4900, 5041, 5184, 5329, 5476, 5625, 5776, 5929, 6084, 6241, 6400, 6561, 6724, 6889, 7056, 7225, 7396, 7569, 7744, 7921, 8100, 8281, 8464, 8649, 8836, 9025, 9216, 9409, 9604, 9801]
现在要把他们排序，要求按各位数字之和的大小，由小到大排序。结果为
- [1, 100, 4, 121, 400, 16, 25, 1024, 1600, 2401, 2500, 9, 36, 81, 144, 225, 324, 441, 900, 1521, 2025, 2304, 2601, 3600, 8100, 64, 361, 1225, 2116, 3025, 5041, 6400, 49, 256, 625, 841, 1156, 1444, 2209, 2704, 3136, 3721, 4225, 4900, 6241, 169, 196, 484, 529, 961, 1681, 3364, 3481, 4624, 7225, 9025, 576, 729, 1089, 1296, 1764, 2916, 3249, 4356, 4761, 5184, 5625, 6084, 6561, 7056, 9216, 9801, 289, 676, 784, 1369, 1936, 2809, 3844, 4096, 5329, 6724, 7921, 8281, 9604, 1849, 5476, 7744, 8464, 9409, 4489, 5776, 5929, 7396, 8836, 3969, 7569, 8649, 6889]
我的解法：
- def sum1(num):
- s = 0
- while num:
- s += num % 10
- num //= 10
- return s
- list1 = [i*i for i in range(1, 100)]
- list1.sort(key = sum1)
- print(list1)
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