Range add / Range max with count
(Mylib/AlgebraicStructure/MonoidAction/add_max_with_count.cpp)

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• Last update: 2021-04-23 23:44:44+09:00

Operations

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Notes

Problems

References

Verified with

• test/aoj/3035/main.test.cpp

Code

#pragma once

namespace haar_lib {
  template <typename MonoidUpdate, typename MonoidGet>
  struct add_max_with_count {
    using monoid_get        = MonoidGet;
    using monoid_update     = MonoidUpdate;
    using value_type_get    = typename MonoidGet::value_type;
    using value_type_update = typename MonoidUpdate::value_type;

    value_type_get operator()(const value_type_get &a, const value_type_update &b, int) const {
      return {a.value ? a.value.value() + b : a.value, a.count};
    }
  };
}  // namespace haar_lib

#line 2 "Mylib/AlgebraicStructure/MonoidAction/add_max_with_count.cpp"

namespace haar_lib {
  template <typename MonoidUpdate, typename MonoidGet>
  struct add_max_with_count {
    using monoid_get        = MonoidGet;
    using monoid_update     = MonoidUpdate;
    using value_type_get    = typename MonoidGet::value_type;
    using value_type_update = typename MonoidUpdate::value_type;

    value_type_get operator()(const value_type_get &a, const value_type_update &b, int) const {
      return {a.value ? a.value.value() + b : a.value, a.count};
    }
  };
}  // namespace haar_lib

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