Submission #877348

#	Time	Username	Problem	Language	Result	Execution time	Memory
877348		Irate	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	47 / 100	2950 ms	125608 KiB

sortbooks

#include<bits/stdc++.h>
using namespace std;
const int mxN = 1e6 + 5;
int LOG[mxN];
struct SparseTable{
    vector<vector<int>>sTable;
    SparseTable(int n, vector<int>&v){
        sTable.resize(LOG[n] + 1);
        for(int i = 0;i <= LOG[n];++i){
            sTable[i].resize(n + 1);
        }
        for(int i = 1;i <= n;++i){
            sTable[0][i] = v[i];
        }
        for(int i = 1;i <= LOG[n];++i){
            for(int j = 1;j + (1 << (i - 1)) <= n;++j){
                sTable[i][j] = max(sTable[i - 1][j], sTable[i - 1][j + (1 << (i - 1))]);
            }
        }
    }
    int Query(int l, int r){
        int lg = LOG[r - l + 1];
        return max(sTable[lg][l], sTable[lg][r - (1 << lg) + 1]);
    }
};
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q, MAX = 0;
    cin >> n >> q;
    vector<int>v(n + 1);
    vector<vector<int>>pos(1001);
    LOG[1] = 0;
    for(int i = 2;i <= n;++i)LOG[i] = LOG[i >> 1] + 1;
    for(int i = 1;i <= n;++i){
        cin >> v[i];
        if(v[i] <= 1000)pos[v[i]].push_back(i);
        MAX = max(MAX, v[i]);
    }
    vector<int>pref(n + 1);
    for(int i = 1;i < n;++i){
        pref[i] = (v[i] > v[i + 1]);
    }
    for(int i = 1;i < n;++i){
        pref[i] += pref[i - 1];
    }
    SparseTable table(n, v);
    while(q--){
        int l, r, k;
        cin >> l >> r >> k;
        if(n <= 5000 && q <= 5000){
            int mx = v[l], res = 0;
            for(int i = l + 1;i <= r;++i){
                if(mx > v[i]){
                    res = max(res, mx + v[i]);
                }
                mx = max(mx, v[i]);
            }
            cout << (res <= k) << '\n';
        }
        else if(n <= 1e5 && MAX <= 1000){
            int mx = 0;
            for(int i = 0;i <= 1000;++i){
                if(pos[i].size() != 0){
                    auto itr = upper_bound(pos[i].begin(), pos[i].end(), r);
                    if(itr == pos[i].begin())continue;
                    itr--;
                    if(*itr >= l){
                        int R = *itr, MX = table.Query(l, R);
                        mx = max(mx, (MX > i) * (MX + i));
                    }
                }
            }
            cout << (mx <= k) << '\n';
        }
        else{
            int cnt = pref[r - 1] - pref[l - 1];
            if(cnt){
                cout << 0 << '\n';
            }
            else{
                cout << 1 << '\n';
            }
        }
    }
}

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