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Title	the goddamn blog. \| nothing
Description	快速数论变换（NTT） the goddamn blog. nothing here. Blog About Dates Categories Tags 快速数论变换（NTT） 25 Oct 2021 前置知识 FFT 问题引入 FFT用的是浮点运算，并且用到了 $\sin \; \cos$ 函数，运算效率比较低并且精度不足。而
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WebSite	yzzzf.xyz
Host IP	185.199.111.153
Location	-

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yzzzf.xyz Valuation

US$2,123

Last updated: 2023-05-17 08:52:15

yzzzf.xyz has Semrush global rank of 0. yzzzf.xyz has an estimated worth of US$ 2,123, based on its estimated Ads revenue. yzzzf.xyz receives approximately 244 unique visitors each day. Its web server is located in -, with IP address 185.199.111.153. According to SiteAdvisor, yzzzf.xyz is safe to visit.

Traffic & Worth Estimates

Purchase/Sale Value	US$2,123
Daily Ads Revenue	US$1
Monthly Ads Revenue	US$58
Yearly Ads Revenue	US$705
Daily Unique Visitors	16
Note: All traffic and earnings values are estimates.

DNS Records

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yzzzf.xyz.	A	600	IP: pluto0x0.github.io.
pluto0x0.github.io.	A	3599	IP: 185.199.111.153
pluto0x0.github.io.	A	3599	IP: 185.199.110.153
pluto0x0.github.io.	A	3599	IP: 185.199.109.153
pluto0x0.github.io.	A	3599	IP: 185.199.108.153
yzzzf.xyz.	AAAA	599	IPV6: pluto0x0.github.io.
pluto0x0.github.io.	AAAA	3600	IPV6: 2606:50c0:8000::153
pluto0x0.github.io.	AAAA	3600	IPV6: 2606:50c0:8001::153
pluto0x0.github.io.	AAAA	3600	IPV6: 2606:50c0:8002::153
pluto0x0.github.io.	AAAA	3600	IPV6: 2606:50c0:8003::153
yzzzf.xyz.	NS	599	NS Record: pluto0x0.github.io.
yzzzf.xyz.	MX	599	MX Record: pluto0x0.github.io.
yzzzf.xyz.	TXT	599	TXT Record: pluto0x0.github.io.

HtmlToTextCheckTime:2023-05-17 08:52:15

the goddamn blog. nothing here. Blog About Dates Categories Tags 快速数论变换（NTT） 25 Oct 2021 前置知识 FFT 问题引入 FFT用的是浮点运算，并且用到了 $\sin \; \cos$ 函数，运算效率比较低并且精度不足。而NTT用的是数论变换，都是整数运算。原根 https://oi-wiki.org/math/number-theory/primitive-root/ https://zhuanlan.zhihu.com/p/166043237 NTT 模数 $p = 998244353 = 7\times 17 \times 2^{23}$ 的原根 $g=3$ ，将 $g_n=g^{\frac{p-1}{n}}$ 看作是FFT中的 $\omega_n$ ，它们具有相同的性质： \[\begin{aligned} g_n^n &\equiv 1 \mod p \\ \omega_n^n &= 1 \end{aligned}\] \[\begin{aligned} g_n^{n/2} &\equiv -1 \mod p \\ \omega_n^{n / 2} &= -1 \end{aligned}\] 示例代码模板：高精度乘法 #include <bits/stdc++.h> #define rep(i, a, b) for (int i = (a); i <= (b); i++) #define per(i, a, b) for (int i = (a); i >= (b); i--) #define D(x) cout << #x << " : " << x << endl using namespace std; typedef long long ll; const int N = 1 << 21; const int mod = 998244353; int rev[N]; int qpow(int x, int y) { int ret = 1; while (y) { if (y & 1) ret = (ll)ret * x % mod; x = (ll)x * x % mod;

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yzzzf.xyz Whois Information

Domain Name: YZZZF.XYZ
Registry Domain ID: D158486821-CNIC
Registrar WHOIS Server: grs-whois.hichina.com
Updated Date: 2022-01-13T01:57:48.0Z
Creation Date: 2020-01-03T14:46:31.0Z
Registry Expiry Date: 2023-01-03T23:59:59.0Z
Registrar: Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
Registrar IANA ID: 1599
Domain Status: ok https://icann.org/epp#ok
Registrant Organization: ying zi fan
Registrant State/Province: zhe jiang
Registrant Country: CN
Name Server: DNS9.HICHINA.COM
Name Server: DNS10.HICHINA.COM
DNSSEC: unsigned
Registrar Abuse Contact Email: domainabuse@service.aliyun.com
Registrar Abuse Contact Phone: +86.95187
>>> Last update of WHOIS database: 2022-03-16T08:44:00.0Z <<<

yzzzf.xyz valuation and analysis