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954c45864b
* docs: add Japanese documents (`ja/docs`) * docs: add Japanese documents (`ja/codes`) * docs: add Japanese documents * Remove pythontutor blocks in ja/ * Add an empty at the end of each markdown file. * Add the missing figures (use the English version temporarily). * Add index.md for Japanese version. * Add index.html for Japanese version. * Add missing index.assets * Fix backtracking_algorithm.md for Japanese version. * Add avatar_eltociear.jpg. Fix image links on the Japanese landing page. * Add the Japanese banner. --------- Co-authored-by: krahets <krahets@163.com>
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
/**
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* File: simple_hash.cpp
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* Created Time: 2023-06-21
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* Author: krahets (krahets@163.com)
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*/
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#include "../utils/common.hpp"
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/* 加算ハッシュ */
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int addHash(string key) {
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long long hash = 0;
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const int MODULUS = 1000000007;
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for (unsigned char c : key) {
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hash = (hash + (int)c) % MODULUS;
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}
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return (int)hash;
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}
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/* 乗算ハッシュ */
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int mulHash(string key) {
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long long hash = 0;
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const int MODULUS = 1000000007;
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for (unsigned char c : key) {
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hash = (31 * hash + (int)c) % MODULUS;
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}
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return (int)hash;
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}
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/* XORハッシュ */
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int xorHash(string key) {
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int hash = 0;
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const int MODULUS = 1000000007;
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for (unsigned char c : key) {
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hash ^= (int)c;
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}
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return hash & MODULUS;
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}
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/* 回転ハッシュ */
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int rotHash(string key) {
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long long hash = 0;
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const int MODULUS = 1000000007;
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for (unsigned char c : key) {
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hash = ((hash << 4) ^ (hash >> 28) ^ (int)c) % MODULUS;
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}
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return (int)hash;
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}
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/* ドライバーコード */
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int main() {
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string key = "Hello algorithm";
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int hash = addHash(key);
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cout << "Additive hash value is " << hash << endl;
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hash = mulHash(key);
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cout << "Multiplicative hash value is " << hash << endl;
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hash = xorHash(key);
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cout << "XOR hash value is " << hash << endl;
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hash = rotHash(key);
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cout << "Rotational hash value is " << hash << endl;
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return 0;
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} |