什么时候才能有空做算法啊…哎
class Solution { HashSetset=new HashSet<>(); public boolean reorderedPowerOf2(int n) { set=new HashSet<>(); init(); return set.contains(count(n)); } public void init(){ for(int i=1;i<=1e9;i=i<<1){ set.add(count(i)); } } public String count(int n){ char[] cs=new char[10]; while(n>0){ cs[n%10]++; n=n/10; } return new String(cs); } }