{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"数论大佬 Vv 最近玩起了一种特殊数字\n这种特殊数字的特点为从最高位到最低位数位上的数保持单调不下降 \n如 2333456 就是个特殊数字\nVv 把这种特殊数字定义为 Vv 数\n身为数论大佬的她 ,想考考你,区间 [L , R] 内有多少个 Vv 数 "}},{"title":"Input","value":{"format":"MD","content":"有多组测试数据。每组只含两个数字 L , R,意义如题目描述。"}},{"title":"Output","value":{"format":"MD","content":"输出 [L, R] 之间有多少个Vv数。"}},{"title":"Input","value":{"format":"MD","content":"1 9\n1 19"}},{"title":"Ouput","value":{"format":"MD","content":"9\n18"}},{"title":"Hint","value":{"format":"MD","content":"保证 L , R 都在 int 范围内"}}]}