Now you have a string consists of uppercase letters, two integers AA and BB. We call a substring wonderful substring when the times it appears in that string is between AA and BB (A \le times \le BA≤times≤B). Can you calculate the number of wonderful sub…
[css] 你认为sass和less的最大区别是什么呢?你喜欢哪个?为什么?
less 没有循环只有递归;
less 没有 if 只有 when;
sass 多个 function 很棒,否则只能堆变量了;
less 拼接类名的字符串需加上 ~…