1 条题解
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0
import java.util.Scanner; public class Main { static long solve(long n) { if (n <= 9) return n; char[] s = String.valueOf(n).toCharArray(); long res = 0L; int len = s.length; for (int i = len - 1; i > 0; i--) { res += 9; if (s[i] < '9') { s[i - 1] = (char) (s[i - 1] - 1); } } res += s[0] - '0'; return res; } public static void main(String[] args) { Scanner in = new Scanner(System.in); long n = in.nextLong(); System.out.println(solve(n)); } }
- 1
信息
- ID
- 20939
- 时间
- 2000ms
- 内存
- 256MiB
- 难度
- 7
- 标签
- (无)
- 递交数
- 314
- 已通过
- 81
- 上传者