ZTL - 基本开始模板

zimindaada · 2020-06-12 15:26:57 · 个人记录

    inline ll ksm(ll x, ll y){
        ll ret = 1;
        while(y){if(y & 1) ret = ret * x % mod; y >>= 1; x = x*x%mod;}
        return ret;
    }
    inline ll inv(ll x){return ksm(x%mod,mod-2);}