Sum group
(Mylib/AlgebraicStructure/Group/sum.cpp)

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

Requirements

Notes

Problems

References

Verified with

• test/aoj/2842/main.fenwick_tree.test.cpp
• test/aoj/DSL_2_B/main.fenwick_tree.test.cpp
• test/yosupo-judge/rectangle_sum/main.fenwick_tree.test.cpp

Code

#pragma once

namespace haar_lib {
  template <typename T>
  struct sum_group {
    using value_type = T;

    value_type operator()() const { return 0; }
    value_type operator()(const value_type &a, const value_type &b) const { return a + b; }
    value_type inv(const value_type &a) const { return -a; }
  };
}  // namespace haar_lib

#line 2 "Mylib/AlgebraicStructure/Group/sum.cpp"

namespace haar_lib {
  template <typename T>
  struct sum_group {
    using value_type = T;

    value_type operator()() const { return 0; }
    value_type operator()(const value_type &a, const value_type &b) const { return a + b; }
    value_type inv(const value_type &a) const { return -a; }
  };
}  // namespace haar_lib

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