Submission #511544

#	Time	Username	Problem	Language	Result	Execution time	Memory
511544		Gev2706	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	47 / 100	2320 ms	131564 KiB

sortbooks

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <string>
#include <sstream>
#include <iomanip>
#include <map>
#include <unordered_map>
#include <stack>
#include <cstdio>
#include <climits>
#include <tuple>
#include <ctime>
#include <cstring>
#include <numeric>
#include <functional>
#include <chrono>
#include <cassert>
#include <bitset>
using namespace std;
using ll = long long;
const int mod = 1e9 + 7;
const int N = 5e6 + 5;
#define full(a) a.begin(), a.end()
#define eps 1e-9
vector<int> l2;

int query(int& l, int& r, vector<vector<int>>& s) {
    return min(s[l][l2[r - l + 1]], s[r - (1 << l2[r - l + 1]) + 1][l2[r - l + 1]]);
}
int query1(int& l, int& r, vector<vector<int>>& s) {
    return max(s[l][l2[r - l + 1]], s[r - (1 << l2[r - l + 1]) + 1][l2[r - l + 1]]);
}

void solve() {
    int n, m; scanf("%d%d", &n, &m);
    vector<int> w(n);
    bool t = 1;
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &w[i]); if (w[i] > 1000)t = 0;
    }
    if (n <= 5000 && m <= 5000) {
        while (m--) {
            int l, r, k; cin >> l >> r >> k;
            l--, r--;
            int ans = 1;
            set<int> s;
            s.insert(w[r]);
            for (int i = r - 1; i >= l; i--) {
                auto it = s.lower_bound(w[i]);
                if (it != s.begin()) {
                    it--;
                    if (*it + w[i] > k)ans = 0;
                }
                s.insert(w[i]);
            }
            cout << ans << endl;
        }
    }
    else if (t)
    {
        l2.resize(n + 2);
        l2[1] = 0;

        for (int i = 2; i <= n + 1; i++)
            l2[i] = l2[i / 2] + 1;

        vector<vector<int>> st(n + 2, vector<int>(22));
        for (int i = 0; i < n; i++)
            st[i][0] = w[i];

        for (int j = 1; j <= 21; j++)
            for (int i = 0; i + (1 << j) <= n + 1; i++)
                st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
        vector<vector<int>> inds(1005);
        for (int i = 0; i < n; i++) {
            inds[w[i]].push_back(i);
        }
        while (m--) {
            int l, r, k; scanf("%d%d%d", &l, &r, &k);
            l--, r--;
            if (k >= 2000) {
                printf("1\n");
                continue;
            }
            bool ttt = 1;
            for (int num = 0; num <= 1000; num++) {
                if (inds[num].empty())continue;
                auto it = upper_bound(inds[num].begin(), inds[num].end(), r);
                if (it == inds[num].begin()) {
                    continue;
                }
                it--;
                int ind = *it;
                ind--;
                if (ind >= l && ind <= r) {
                    int kpp = query1(l, ind, st);
                    if (kpp + num > k && kpp > num) {
                        printf("0\n");
                        ttt = 0;
                        break;
                    }
                }

            }
            if (ttt) {
                printf("1\n");
            }
        }
    }
    else {
        vector<int> v(n);
        stack<int> st;
        for (int i = 0; i < n; i++) {
            if (st.empty()) {
                st.push(i);
                continue;
            }
            while (!st.empty() && w[st.top()] > w[i]) {
                v[st.top()] = i;
                st.pop();
            }
            st.push(i);
        }
        while (!st.empty())
        {
            v[st.top()] = 2e9;
            st.pop();
        }
        vector<vector<int>> sp(n + 2, vector<int>(22, 0));
        for (int i = 0; i < n; i++)sp[i][0] = v[i];
        for (int j = 1; j <= 21; j++) {
            for (int i = 0; i + (1 << j) < n + 2; i++) {
                sp[i][j] = min(sp[i][j - 1], sp[i + (1 << (j - 1))][j - 1]);
            }
        }
        l2.resize(n + 2);
        l2[1] = 0;

        for (int i = 2; i <= n + 1; i++)
            l2[i] = l2[i / 2] + 1;

        while (m--) {
            int l, r, k; scanf("%d%d%d", &l, &r, &k);
            l--, r--;
            if (query(l, r, sp) <= r) {
                printf("0\n");
            }
            else printf("1\n");
        }
    }
}
int main()
{
    //int tc; cin >> tc;while(tc--)

    solve();
    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'void solve()':
sortbooks.cpp:42:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     int n, m; scanf("%d%d", &n, &m);
      |               ~~~~~^~~~~~~~~~~~~~~~
sortbooks.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         scanf("%d", &w[i]); if (w[i] > 1000)t = 0;
      |         ~~~~~^~~~~~~~~~~~~
sortbooks.cpp:87:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |             int l, r, k; scanf("%d%d%d", &l, &r, &k);
      |                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:151:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  151 |             int l, r, k; scanf("%d%d%d", &l, &r, &k);
      |                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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