summaryrefslogtreecommitdiff
path: root/string/rollingHash2.cpp
diff options
context:
space:
mode:
authorGloria Mundi <gloria@gloria-mundi.eu>2024-11-16 01:24:14 +0100
committerGloria Mundi <gloria@gloria-mundi.eu>2024-11-16 01:24:14 +0100
commit98567ec798aa8ca2cfbcb85c774dd470f30e30d4 (patch)
tree5113d5cc24d1ad5f93810b6442ce584a36950dc8 /string/rollingHash2.cpp
parentad3856a6b766087df0036de0b556f4700a6498c9 (diff)
parent8d11c6c8213f46f0fa19826917c255edd5d43cb1 (diff)
mzuenni tests
Diffstat (limited to 'string/rollingHash2.cpp')
-rw-r--r--string/rollingHash2.cpp18
1 files changed, 0 insertions, 18 deletions
diff --git a/string/rollingHash2.cpp b/string/rollingHash2.cpp
deleted file mode 100644
index f60db2e..0000000
--- a/string/rollingHash2.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-// M = 1.7e9 + 9, 1e18L + 9, 2.2e18L + 7
-struct Hash {
- static constexpr ll M = 3e18L + 37;
- static constexpr ll Q = 318LL << 53; // Random in [SIGMA+1, M)
- vector<ll> pref = {0}, power = {1};
-
- Hash(const string& s) {
- for (auto c : s) {
- pref.push_back((mul(pref.back(), Q) + c + M) % M);
- power.push_back(mul(power.back(), Q));
- }}
-
- ll operator()(int l, int r) {
- return (pref[r] - mul(power[r-l], pref[l]) + M) % M;
- }
-
- static ll mul(__int128 a, ll b) {return a * b % M;}
-};