Submission #1036713

#	Time	Username	Problem	Language	Result	Execution time	Memory
1036713		BF001	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	711 ms	105380 KiB

sortbooks

#include<bits/stdc++.h>
using namespace std;
 
#define N 1000005

struct ii{
    int l, r, idx;
    bool operator < (ii& o){
        return l < o.l;
    }
};

struct fw{
    int n;
    vector<int> bit;
    fw(int siz){
        n = siz;
        bit.resize(n + 1, 0);
    }
    void ud(int pos, int val){
        while (pos <= n){
            bit[pos] = max(bit[pos], val);
            pos += (pos & (-pos));
        }
    }
    int get(int pos){
        int rt = 0;
        while (pos >= 1){
            rt = max(rt, bit[pos]);
            pos -= (pos & (-pos));
        }
        return rt;
    }
};

int n, m, a[N], res[N];
vector<ii> vd, qr[N]; 

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
 
    stack<int> st;
    cin >> n >> m;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
        while (st.size() && a[st.top()] <= a[i]) st.pop();
        if (st.size()){
            vd.push_back({st.top(), i, 0});
        }
        st.push(i);
    }
 
    for (int i = 1; i <= m; i++){
        int l, r, k;
        cin >> l >> r >> k;
        qr[l].push_back({k, r, i});
    }

    sort(vd.begin(), vd.end());
    int j = (int) vd.size();
    fw s1(n);

    for (int i = n; i >= 1; i--){
        while (j - 1 >= 0 && vd[j - 1].l >= i){
            j--;
            s1.ud(vd[j].r, a[vd[j].l] + a[vd[j].r]);
        }
        for (auto x : qr[i]){
            res[x.idx] = (s1.get(x.r) <= x.l);
        }
    }

    for (int i = 1; i <= m; i++) cout << res[i] << "\n";

    return 0;
}

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