// split():字符串中的方法,把字符串转成数组. // sort():数组中的排序方法,按照ACALL码进行排序. // join():数组中的方法,把数组转换为字符串 function demo(str) { var arr = str.split(''); //把字符串转换为数组 str = arr.sort().join(''); //首先进行排序,这样结果会把相同的字符放在一起,然后再转换为字符串 var value = ''; var index = 0; var re = /
K - 秋实大哥の恋爱物语 Time Limit: 5000/2000MS (Java/Others) Memory Limit: 32000/32000KB (Java/Others) Submit Status 传说有这么一个故事! 在一个月白风清的晚上,秋实大哥约一位他心仪的妹子一起逛校园,浪漫的秋实大哥决定在当晚对妹子表白.“XXXXX...”,秋实大哥温情地说完了准备已久的话.而妹子决定用一种浪漫的方式接受秋实大哥(其实妹子早已对秋实大哥动心,这一刻她早已迫不及待了,但还是决定
Given a non-empty string str and an integer k, rearrange the string such that the same characters are at least distance k from each other. All input strings are given in lowercase letters. If it is not possible to rearrange the string, return an empt
Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: The length of num is less than 10002 and will be ≥ k. The given num does not contain any leading zero. Ex