Java title base algorithm (08): find s = a + aa + aaa + aaaa + aa ... the value of a, where a is a number. E.g. 2 + 22 + 222 + 2222 + 22222 (in this case the sum total of the number 5), a control keyboard a few numbers together.
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Origin blog.csdn.net/weixin_44803446/article/details/105354780
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