Submission #591976

#	Time	Username	Problem	Language	Result	Execution time	Memory
591976		piOOE	Fire (JOI20_ho_t5)	C++17	8 / 100	1088 ms	4704 KiB

ho_t5

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

template<typename T, class F = function<T(const T&, const T&)>>
class SegTree {
public:
    T neutral = 0;
    vector <T> t;
    int sz;
    F func;

    SegTree() = default;
    SegTree(int n, const F& f, T x = 0): func(f) {
        init(n, x);
    }

    void init(int n, T x = 0) {
        sz = n;
        neutral = x;
        t.assign(sz << 1, x);
    }

    void modify(int i, T v) {
        int x = i + sz;
        t[x] = v;
        x >>= 1;
        while (x) {
            t[x] = func(t[x << 1], t[x << 1 | 1]);
            x >>= 1;
        }
    }

    T get(int l, int r) {
        l += sz;
        r += sz;
        T ans = neutral;
        while (l < r) {
            if (l & 1) {
                ans = func(ans, t[l++]);
            }
            if (r & 1) {
                ans = func(ans, t[--r]);
            }
            l >>= 1;
            r >>= 1;
        }
        return ans;
    }

};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, q;
    cin >> n >> q;
    vector<int> s(n);
    for (int i = 0; i < n; ++i) {
        cin >> s[i];
    }
    SegTree<int> st(n, [](int i, int j) {return max(i, j);});
    for (int i = 0; i < n; ++i) {
        st.modify(i, s[i]);
    }
    while (q--) {
        int t, l, r;
        cin >> t >> l >> r;
        ll ans = 0;
        for (int i = l - 1; i < r; ++i) {
            ans += st.get(max(0, i - t), i + 1);
        }
        cout << ans << '\n';
    }
    return 0;
}

• Subtask 1: 1 / 1
• Subtask 2: 0 / 6
• Subtask 3: 7 / 7
• Subtask 4: 0 / 6
• Subtask 5: 0 / 80