hdu4349 Xiao Ming's Hope-多校联结五

hdu4349 Xiao Ming's Hope-----多校联合五

水题。

#include<iostream>#include<cstdlib>#include<stdio.h>#define ll __int64using namespace std;ll power(int a,int b){    ll res=1;    while(b)    {        if(b&1) res*=a;        a=a*a;        b>>=1;    }    return res;}int main(){     ll n;     while(scanf("%I64d",&n)!=EOF)     {         int cc=0;         while(n)         {             if(n%2!=0) cc++;             n/=2;         }         ll pp=power(2,cc);         printf("%I64d\n",pp);     }}