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Add operator< to rolling_hash::Hash #324

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merged 1 commit into from
Jan 13, 2024
Merged

Add operator< to rolling_hash::Hash #324

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5 changes: 5 additions & 0 deletions string/rolling_hash_1d.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,11 @@ template <typename V> struct rolling_hash {
return length == r.length and val == r.val;
}

bool operator<(const Hash &x) const { // To use std::map
if (length != x.length) return length < x.length;
return val < x.val;
}

Hash operator*(const Hash &r) const {
return Hash(length + r.length, val * power.at(r.length) + r.val);
}
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