Tifa's CP Library

:heavy_check_mark: src/test_cpverifier/library-checker/point_add_range_sum.fenwick.test.cpp

Depends on

Code

#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"

#include "../../code/ds/fenwick.hpp"

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  u32 n, q;
  std::cin >> n >> q;
  tifa_libs::ds::fenwick<u64> f(n + 1);
  u64 x;
  for (u32 i = 1; i <= n; ++i) {
    std::cin >> x;
    f.add(i, x);
  }
  for (u32 i = 1; i <= q; ++i) {
    u32 op, l, r;
    std::cin >> op >> l >> r;
    if (!op) f.add(l + 1, r);
    else std::cout << f.sum(r) - f.sum(l) << '\n';
  }
  return 0;
}
#line 1 "src/test_cpverifier/library-checker/point_add_range_sum.fenwick.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"

#line 1 "src/code/ds/fenwick.hpp"



#line 1 "src/code/bit/lowbit.hpp"



#line 1 "src/code/util/util.hpp"



#include <bits/stdc++.h>

template <class T>
constexpr T abs(T x) { return x < 0 ? -x : x; }

using i8 = int8_t;
using i16 = int16_t;
using i32 = int32_t;
using i64 = int64_t;
using i128 = __int128_t;
using isz = ptrdiff_t;

using u8 = uint8_t;
using u16 = uint16_t;
using u32 = uint32_t;
using u64 = uint64_t;
using u128 = __uint128_t;
using usz = size_t;

using f32 = float;
using f64 = double;
using f128 = long double;

template <class T>
using ptt = std::pair<T, T>;
template <class T>
using pt3 = std::tuple<T, T, T>;
template <class T>
using pt4 = std::tuple<T, T, T, T>;

template <class T, usz N>
using arr = std::array<T, N>;
template <class T>
using vec = std::vector<T>;
template <class T>
using vvec = vec<vec<T>>;
template <class T>
using v3ec = vec<vvec<T>>;
template <class U, class T>
using vecp = vec<std::pair<U, T>>;
template <class U, class T>
using vvecp = vvec<std::pair<U, T>>;
template <class T>
using vecpt = vec<ptt<T>>;
template <class T>
using vvecpt = vvec<ptt<T>>;

template <class T, class C = std::less<T>>
using pq = std::priority_queue<T, vec<T>, C>;
template <class T>
using pqg = std::priority_queue<T, vec<T>, std::greater<T>>;

using strn = std::string;
using strnv = std::string_view;

using vecu = vec<u32>;
using vvecu = vvec<u32>;
using v3ecu = v3ec<u32>;
using vecu64 = vec<u64>;
using vecb = vec<bool>;
using vvecb = vvec<bool>;

#ifdef ONLINE_JUDGE
#undef assert
#define assert(x) 42
#endif

using namespace std::literals;

constexpr i8 operator""_i8(unsigned long long x) { return (i8)x; }
constexpr i16 operator""_i16(unsigned long long x) { return (i16)x; }
constexpr i32 operator""_i32(unsigned long long x) { return (i32)x; }
constexpr i64 operator""_i64(unsigned long long x) { return (i64)x; }
constexpr isz operator""_iz(unsigned long long x) { return (isz)x; }

constexpr u8 operator""_u8(unsigned long long x) { return (u8)x; }
constexpr u16 operator""_u16(unsigned long long x) { return (u16)x; }
constexpr u32 operator""_u32(unsigned long long x) { return (u32)x; }
constexpr u64 operator""_u64(unsigned long long x) { return (u64)x; }
constexpr usz operator""_uz(unsigned long long x) { return (usz)x; }

inline const auto fn_0 = [](auto&&...) {};


#line 5 "src/code/bit/lowbit.hpp"

namespace tifa_libs::bit {

template <class T>
constexpr T lowbit(T x) { return T(1) << std::countr_zero(x); }

}  // namespace tifa_libs::bit


#line 5 "src/code/ds/fenwick.hpp"

namespace tifa_libs::ds {

template <class T>
class fenwick {
  vec<T> a;

 public:
  //! [1, sz)
  explicit constexpr fenwick(u32 sz) : a(sz) { assert(sz > 1); }

  //! [pos, sz), pos > 0
  constexpr void add(u32 pos, T const &x) {
    if (!pos) return;
    for (; pos < a.size(); pos += bit::lowbit(pos)) a[pos] += x;
  }
  //! [1, pos)
  constexpr T sum(u32 pos) {
    T ret = 0;
    for (pos = std::min(pos, (u32)a.size() - 1); pos; pos -= bit::lowbit(pos)) ret += a[pos];
    return ret;
  }
  //! for weighted fenwick
  constexpr T kth_max(u32 k) {
    u32 now = 0, n = std::bit_ceil(a.size());
    T s{};
    while (n) {
      u32 to = now | n;
      if (to >= a.size()) continue;
      if (T x = s + a[to]; x < k) {
        now = to;
        s = x;
      }
    }
    return now + 1;
  }
};

}  // namespace tifa_libs::ds


#line 4 "src/test_cpverifier/library-checker/point_add_range_sum.fenwick.test.cpp"

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  u32 n, q;
  std::cin >> n >> q;
  tifa_libs::ds::fenwick<u64> f(n + 1);
  u64 x;
  for (u32 i = 1; i <= n; ++i) {
    std::cin >> x;
    f.add(i, x);
  }
  for (u32 i = 1; i <= q; ++i) {
    u32 op, l, r;
    std::cin >> op >> l >> r;
    if (!op) f.add(l + 1, r);
    else std::cout << f.sum(r) - f.sum(l) << '\n';
  }
  return 0;
}

Test cases

Env Name Status Elapsed Memory
g++-12 example_00 :heavy_check_mark: AC 10 ms 4 MB
g++-12 max_random_00 :heavy_check_mark: AC 160 ms 7 MB
g++-12 max_random_01 :heavy_check_mark: AC 159 ms 7 MB
g++-12 max_random_02 :heavy_check_mark: AC 167 ms 7 MB
g++-12 max_random_03 :heavy_check_mark: AC 154 ms 7 MB
g++-12 max_random_04 :heavy_check_mark: AC 155 ms 7 MB
g++-12 random_00 :heavy_check_mark: AC 128 ms 6 MB
g++-12 random_01 :heavy_check_mark: AC 132 ms 7 MB
g++-12 random_02 :heavy_check_mark: AC 86 ms 4 MB
g++-12 random_03 :heavy_check_mark: AC 52 ms 7 MB
g++-12 random_04 :heavy_check_mark: AC 54 ms 6 MB
g++-12 small_00 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_01 :heavy_check_mark: AC 9 ms 4 MB
g++-12 small_02 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_03 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_04 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_05 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_06 :heavy_check_mark: AC 10 ms 4 MB
g++-12 small_07 :heavy_check_mark: AC 11 ms 4 MB
g++-12 small_08 :heavy_check_mark: AC 11 ms 4 MB
g++-12 small_09 :heavy_check_mark: AC 11 ms 4 MB
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