HDU - 6063 RXD and math

Bryce1010模板

http://acm.hdu.edu.cn/showproblem.php?pid=6063

打表发现规律是n^k

#include <iostream>
#include<string.h>
#include<cmath>
using namespace std;
#define ll long long
const int MOD=1e9+7;
const int MAXN=1e6;
bool check[MAXN+10];
int prime[MAXN+10];
int mu[MAXN+10];
void moblus()
{
    memset(check,false,sizeof(check));
    mu[1]=1;
    int tot=0;
    for(int i=2;i<MAXN;i++)
    {
        if(!check[i])
        {
            prime[tot++]=i;
            mu[i]=-1;
        }
        for(int j=0;j<tot;j++)
        {
            if(i*prime[j]>MAXN)break;
            check[i*prime[j]]=true;
            if(i%prime[j]==0)
            {
                mu[i*prime[j]]=0;
                break;
            }
            else
            {
                mu[i*prime[j]]=-mu[i];
            }
        }
    }
}

ll pow_mod(ll a,ll n,ll mod)
{
    ll ret=1;
    //ll tmp=a%mod;
    a=a%mod;
    while(n)
    {
        if(n&1)ret=(ret*a)%mod;
        a=a*a%mod;
        n>>=1;
    }
    return ret%MOD;
}

int main()
{
    ll n,k;
    ll Case=1;
    while(cin>>n>>k)
    {
        cout<<"Case #"<<Case++<<": "<<pow_mod(n,k,MOD)%MOD<<endl;
    }
    return 0;
}