제출 #1346135

#제출 시각아이디문제언어결과실행 시간메모리
1346135JahonaliXHedgehog Daniyar and Algorithms (IZhO19_sortbooks)C++20
100 / 100
1022 ms125780 KiB
#include <bits/stdc++.h>

using namespace std;

#define int long long
constexpr int mod = 1e9 + 7, inf = 1e17;

struct segment_tree {
    int n;
    vector<int> t;
    segment_tree(int n) : n(n), t(n << 2) {}
    void update(int i, int x, int v = 1, int l = 0, int r = -1) {
        if (r < 0) r += n;
        if (l == r) t[v] = x;
        else {
            int m = (l + r) >> 1;
            if (i <= m) update(i, x, v << 1, l, m);
            else update(i, x, v << 1 | 1, m + 1, r);
            t[v] = max(t[v << 1], t[v << 1 | 1]);
        }
    }
    int get(int L, int R, int v = 1, int l = 0, int r = -1) {
        if (r < 0) r += n;
        if (L <= l && r <= R) return t[v];
        int m = (l + r) >> 1;
        if (R <= m) return get(L, R, v << 1, l, m);
        if (L > m) return get(L, R, v << 1 | 1, m + 1, r);
        return max(get(L, R, v << 1, l, m), get(L, R, v << 1 | 1, m + 1, r));
    }
};

int32_t main() {
#ifdef JahonaliX
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n, q;
    cin >> n >> q;
    vector<int> a(n), l(q), r(q), k(q), ans(q);
    vector<vector<int>> o(n);
    for (int &i : a) cin >> i;
    for (int i = 0; i < q; ++i) cin >> l[i] >> r[i] >> k[i], l[i]--, r[i]--, o[l[i]].emplace_back(i);
    stack<int> st;
    segment_tree s(n);
    for (int i = n - 1; i >= 0; --i) {
        while (st.size() && a[st.top()] < a[i]) s.update(st.top(), a[st.top()] + a[i]), st.pop();
        for (int j : o[i]) ans[j] = (s.get(l[j], r[j]) <= k[j]);
        st.emplace(i);
    }
    for (int i : ans) cout << i << '\n';
    return 0;
}
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