제출 #501788

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
501788		dxz05	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	64 / 100	577 ms	100480 KiB

sortbooks

//#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
//#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

int t[2200000];

void update(int v, int tl, int tr, int pos, int val){
    if (tl == tr){
        t[v] = max(t[v], val);
        return;
    }
    int tm = (tl + tr) >> 1;
    if (pos <= tm) update(v + v, tl, tm, pos, val); else
        update(v + v + 1, tm + 1, tr, pos, val);

    t[v] = max(t[v + v], t[v + v + 1]);
}

int get(int v, int tl, int tr, int l, int r){
    if (l <= tl && tr <= r) return t[v];
    if (tl > r || tr < l) return 0;
    int tm = (tl + tr) >> 1;
    return max(get(v + v, tl, tm, l, r), get(v + v + 1, tm + 1, tr, l, r));
}

int a[1000005];
vector<pair<int, pair<int, int>>> queries[1000005];

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

    int n, q;
    cin >> n >> q;

    for (int i = 1; i <= n; i++){
        cin >> a[i];
    }

    for (int i = 1; i <= q; i++){
        int l, r, k;
        cin >> l >> r >> k;
        queries[r].emplace_back(l, make_pair(k, i));
    }

    bitset<200001> ans;

    a[0] = 2e9;
    stack<int> st;
    st.push(0);
    for (int i = 1; i <= n; i++){
        while (!st.empty() && a[st.top()] <= a[i]) st.pop();
        int j = st.top();
        if (j != 0) update(1, 1, n, j, a[j] + a[i]);

        for (auto qu : queries[i]){
            int l = qu.first, k = qu.second.first, ind = qu.second.second;
            ans[ind] = get(1, 1, n, l, i) <= k;
        }

        st.push(i);
    }

    for (int i = 1; i <= q; i++) cout << ans[i] << '\n';


    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 0 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 0 / 23