题目 2491:
信息学奥赛一本通T1587-Windy 数
时间限制: 2s
内存限制: 192MB 提交: 39 解决: 25
题目描述
原题来自:SCOI 2009
Windy 定义了一种 Windy 数:不含前导零且相邻两个数字之差至少为 2 的正整数被称为 Windy 数。
Windy 想知道,在 A 和 B 之间,包括 A 和 B,总共有多少个 Windy 数?
提示
数据范围与提示:
20% 的数据,满足 1≤A≤B≤106 ;
100% 的数据,满足 1≤A≤B≤2×109 。
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