【模板】快速幂

#include <cstdio>using namespace std;#define ll long longint a,b;ll power(ll a,ll b){    ll ans=1,base=a;    while (b!=0)    {        if (b & 1!=0)            ans*=base;        base*=base;        b>>=1;    }    return ans;}int main(){    scanf("%d%d%d",&a,&b);    printf("%lld",power(a,b));    return 0;}

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