Submission #168987

#	Time	Username	Problem	Language	Result	Execution time	Memory
168987		SamAnd	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	2149 ms	102116 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
const int N = 1000006, INF = 1000000009;

int n, qq;
int a[N];

vector<pair<pair<int, int>, int> > v[N];

int t[N * 4];
int laz[N * 4];

void shi(int pos)
{
    if (laz[pos] == 0)
        return;
    t[pos * 2] = max(t[pos * 2], laz[pos]);
    laz[pos * 2] = max(laz[pos * 2], laz[pos]);
    t[pos * 2 + 1] = max(t[pos * 2 + 1], laz[pos]);
    laz[pos * 2 + 1] = max(laz[pos * 2 + 1], laz[pos]);
    laz[pos] = 0;
}

void ubd(int tl, int tr, int l, int r, int y, int pos)
{
    if (l > r)
        return;
    if (tl == l && tr == r)
    {
        t[pos] = max(t[pos], y);
        laz[pos] = max(laz[pos], y);
        return;
    }
    shi(pos);
    int m = (tl + tr) / 2;
    ubd(tl, m, l, min(m, r), y, pos * 2);
    ubd(m + 1, tr, max(m + 1, l), r, y, pos * 2 + 1);
    t[pos] = max(t[pos * 2], t[pos * 2 + 1]);
}

int qry(int tl, int tr, int l, int r, int pos)
{
    if (l > r)
        return 0;
    if (tl == l && tr == r)
        return t[pos];
    shi(pos);
    int m = (tl + tr) / 2;
    return max(qry(tl, m, l, min(m, r), pos * 2),
               qry(m + 1, tr, max(m + 1, l), r, pos * 2 + 1));
}

char ans[N];
int main()
{
    //freopen("input.txt", "r", stdin);
    scanf("%d%d", &n, &qq);
    for (int i = 1; i <= n; ++i)
        scanf("%d", &a[i]);
    for (int i = 1; i <= qq; ++i)
    {
        int l, r, k;
        scanf("%d%d%d", &l, &r, &k);
        v[r].push_back(m_p(m_p(l, k), i));
    }
    stack<int> s;
    for (int i = 1; i <= n; ++i)
    {
        while (!s.empty() && a[i] >= a[s.top()])
            s.pop();
        if (!s.empty())
        {
            ubd(1, n, 1, s.top(), a[i] + a[s.top()], 1);
        }
        s.push(i);
        for (int j = 0; j < v[i].size(); ++j)
        {
            if (qry(1, n, v[i][j].first.first, i, 1) <= v[i][j].first.second)
                ans[v[i][j].second] = '1';
            else
                ans[v[i][j].second] = '0';
        }
    }
    for (int i = 1; i <= qq; ++i)
        printf("%c\n", ans[i]);
    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:77:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < v[i].size(); ++j)
                         ~~^~~~~~~~~~~~~
sortbooks.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &qq);
     ~~~~~^~~~~~~~~~~~~~~~~
sortbooks.cpp:60:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~
sortbooks.cpp:64:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         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: 30 / 30
• Subtask 6: 23 / 23