floor_sum
関数 · floor sum
std::int64_t floor_sum(std::int64_t n, std::int64_t m, std::int64_t a, std::int64_t b);
概要
floor sum
計算量
- $O(\log m)$
関数 · floor sum
std::int64_t floor_sum(std::int64_t n, std::int64_t m, std::int64_t a, std::int64_t b);
floor sum