test/library-checker/point_set_range_sum.test.cpp

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• Last update: 2023-03-05 19:19:13+09:00
• Problem: https://judge.yosupo.jp/problem/point_add_range_sum

Code

#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"
#include <iostream>

#include "atcoder/fenwicktree.hpp"
int main() {
    int n, q;
    std::cin >> n >> q;
    atcoder::fenwick_tree<long long> ft(n);
    for (int i = 0; i < n; i++) {
        long long a;
        std::cin >> a;
        ft.add(i, a - ft.sum(i, i + 1));
    }
    while (q--) {
        int t;
        std::cin >> t;
        if (t == 0) {
            int p;
            long long x;
            std::cin >> p >> x;
            long long d = ft.sum(p, p + 1) + x;
            ft.add(p, d - ft.sum(p, p + 1));
        }
        if (t == 1) {
            int l, r;
            std::cin >> l >> r;
            std::cout << ft.sum(l, r) << '\n';
        }
    }
}

#line 1 "test/library-checker/point_set_range_sum.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/point_add_range_sum"
#include <iostream>

#line 1 "atcoder/fenwicktree.hpp"



#include <cassert>
#include <vector>

#line 1 "atcoder/internal_type_traits.hpp"



#line 5 "atcoder/internal_type_traits.hpp"
#include <numeric>
#include <type_traits>

namespace atcoder {

namespace internal {

#ifndef _MSC_VER
template <class T>
using is_signed_int128 =
    typename std::conditional<std::is_same<T, __int128_t>::value ||
                                  std::is_same<T, __int128>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using is_unsigned_int128 =
    typename std::conditional<std::is_same<T, __uint128_t>::value ||
                                  std::is_same<T, unsigned __int128>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using make_unsigned_int128 =
    typename std::conditional<std::is_same<T, __int128_t>::value,
                              __uint128_t,
                              unsigned __int128>;

template <class T>
using is_integral = typename std::conditional<std::is_integral<T>::value ||
                                                  is_signed_int128<T>::value ||
                                                  is_unsigned_int128<T>::value,
                                              std::true_type,
                                              std::false_type>::type;

template <class T>
using is_signed_int = typename std::conditional<(is_integral<T>::value &&
                                                 std::is_signed<T>::value) ||
                                                    is_signed_int128<T>::value,
                                                std::true_type,
                                                std::false_type>::type;

template <class T>
using is_unsigned_int =
    typename std::conditional<(is_integral<T>::value &&
                               std::is_unsigned<T>::value) ||
                                  is_unsigned_int128<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<
    is_signed_int128<T>::value,
    make_unsigned_int128<T>,
    typename std::conditional<std::is_signed<T>::value,
                              std::make_unsigned<T>,
                              std::common_type<T>>::type>::type;

#else

template <class T> using is_integral = typename std::is_integral<T>;

template <class T>
using is_signed_int =
    typename std::conditional<is_integral<T>::value && std::is_signed<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using is_unsigned_int =
    typename std::conditional<is_integral<T>::value &&
                                  std::is_unsigned<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<is_signed_int<T>::value,
                                              std::make_unsigned<T>,
                                              std::common_type<T>>::type;

#endif

template <class T>
using is_signed_int_t = std::enable_if_t<is_signed_int<T>::value>;

template <class T>
using is_unsigned_int_t = std::enable_if_t<is_unsigned_int<T>::value>;

template <class T> using to_unsigned_t = typename to_unsigned<T>::type;

}  // namespace internal

}  // namespace atcoder


#line 8 "atcoder/fenwicktree.hpp"

namespace atcoder {

// Reference: https://en.wikipedia.org/wiki/Fenwick_tree
template <class T> struct fenwick_tree {
    using U = internal::to_unsigned_t<T>;

  public:
    fenwick_tree() : _n(0) {}
    explicit fenwick_tree(int n) : _n(n), data(n) {}

    void add(int p, T x) {
        assert(0 <= p && p < _n);
        p++;
        while (p <= _n) {
            data[p - 1] += U(x);
            p += p & -p;
        }
    }

    T sum(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        return sum(r) - sum(l);
    }

  private:
    int _n;
    std::vector<U> data;

    U sum(int r) {
        U s = 0;
        while (r > 0) {
            s += data[r - 1];
            r -= r & -r;
        }
        return s;
    }
};

}  // namespace atcoder


#line 5 "test/library-checker/point_set_range_sum.test.cpp"
int main() {
    int n, q;
    std::cin >> n >> q;
    atcoder::fenwick_tree<long long> ft(n);
    for (int i = 0; i < n; i++) {
        long long a;
        std::cin >> a;
        ft.add(i, a - ft.sum(i, i + 1));
    }
    while (q--) {
        int t;
        std::cin >> t;
        if (t == 0) {
            int p;
            long long x;
            std::cin >> p >> x;
            long long d = ft.sum(p, p + 1) + x;
            ft.add(p, d - ft.sum(p, p + 1));
        }
        if (t == 1) {
            int l, r;
            std::cin >> l >> r;
            std::cout << ft.sum(l, r) << '\n';
        }
    }
}

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