摘要:
class Solution { public List> combine(int n, int k) { List> res=new ArrayList>(); combine(n, k, new ArrayList(), res); return res; } private void combine(int num, ... 阅读全文
摘要:
class Solution { public String minWindow(String s, String t) { boolean[] chs=new boolean[128]; int[] cnt=new int[128]; for(int i=0;i0&&r0) count--; ... 阅读全文