2019-04-13 13:23发布 生成海报
typedef long long ll; ll fun(ll x,ll n,ll mod) { ll res=1; while(n>0) { if(n&1)//相当于 if(n%2==1) res=(res*x)%mod; x=(x*x)%mod; n>>=1;//相当于n=n/2; } return res; }
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