[{"sectionTitle":"题目描述","type":"Text","text":"原题来自：SCOI 2009\r\n\r\nWindy 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。\r\n\r\nWindy 想知道，在 $A$ 和 $B$ 之间，包括 $A$ 和 $B$，总共有多少个 Windy 数？","subType":"markdown"},{"sectionTitle":"输入格式","type":"Text","text":"一行两个数，分别为 $A,B$。","subType":"markdown"},{"sectionTitle":"输出格式","type":"Text","text":"输出一个整数，表示答案。","subType":"markdown"},{"sectionTitle":"样例 1","type":"Sample","text":"","subType":"markdown","payload":["1 10","9"]},{"sectionTitle":"样例 2","type":"Sample","text":"","subType":"markdown","payload":["25 50","20"]},{"sectionTitle":"数据范围与提示","type":"Text","text":"$20\\%$ 的数据，满足 $1\\le A\\le B\\le 10^6$； \r\n$100\\%$ 的数据，满足 $1\\le A\\le B\\le 2\\times 10^9$。","subType":"markdown"}]