{"raw_statement":[{"iden":"problem statement","content":"Let us call a positive integer $n$ that satisfies the following condition an **arithmetic number**.\n\n*   Let $d_i$ be the $i$\\-th digit of $n$ from the top (when $n$ is written in base $10$ without unnecessary leading zeros.) Then, $(d_2-d_1)=(d_3-d_2)=\\dots=(d_k-d_{k-1})$ holds, where $k$ is the number of digits in $n$.\n    *   This condition can be rephrased into the sequence $(d_1,d_2,\\dots,d_k)$ being arithmetic.\n    *   If $n$ is a $1$\\-digit integer, it is assumed to be an arithmetic number.\n\nFor example, $234,369,86420,17,95,8,11,777$ are arithmetic numbers, while $751,919,2022,246810,2356$ are not.\nFind the smallest arithmetic number not less than $X$."},{"iden":"constraints","content":"*   $X$ is an integer between $1$ and $10^{17}$ (inclusive)."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$X$"},{"iden":"sample input 1","content":"152"},{"iden":"sample output 1","content":"159\n\nThe smallest arithmetic number not less than $152$ is $159$."},{"iden":"sample input 2","content":"88"},{"iden":"sample output 2","content":"88\n\n$X$ itself may be an arithmetic number."},{"iden":"sample input 3","content":"8989898989"},{"iden":"sample output 3","content":"9876543210"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}