2030: Reachable Numbers
时间限制: 1 Sec 内存限制: 256 MB提交: 132 解决: 53
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题目描述
输入描述
The first line contains one integer n (1≤ n ≤ 10^9) .
输出描述
Print one integer: the number of different numbers that are reachable from nn.
样例输入
1098
样例输出
20
提示
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