Submission #1237571

#	Time	Username	Problem	Language	Result	Execution time	Memory
1237571		orzngaiha	Examination (JOI19_examination)	C++20	0 / 100	3093 ms	320920 KiB

examination

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

int n, q;
const int N = 1e5 + 5;

struct Edge {
    int l, r, z, id;
};
vector<Edge> d;

pair<int, int> a[N], c[N];
int kq[N];

bool cmp(pair<int, int>& a, pair<int, int>& b) {
    return a.first + a.second > b.first + b.second;
}

bool cmp1(Edge& a, Edge& b) {
    return a.z > b.z;
}

map<int, int> bit[N];

void update(int x, int y, int v)
{
    for (int i = x; i <= n; i += i & -i)
        {
        for (int j = y; j <= n; j += j & -j)
        {
            bit[i][j] += v;
        }
    }
}

int get(int x, int y)
{
    int r = 0;
    for (int i = x; i > 0; i -= i & -i) {
        for (int j = y; j > 0; j -= j & -j) {
            r += bit[i][j];
        }
    }
    return r;
}

int main()
{
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n>>q;
    vector<int> b;

    for (int i = 1; i <= n; i++) {
        cin >> a[i].first >> a[i].second;
        b.push_back(a[i].first);
        b.push_back(a[i].second);
    }

    sort(a + 1, a + 1 + n, cmp);

    d.resize(q + 1);

    for (int i = 1; i <= q; i++)
        {
        cin >> d[i].l >> d[i].r >> d[i].z;
        d[i].id = i;
        b.push_back(d[i].l);
        b.push_back(d[i].r);
    }

    sort(b.begin(), b.end());
    b.erase(unique(b.begin(), b.end()), b.end());
    n = b.size();
    for (int i = 1; i <= n; i++)
    {
        int x = lower_bound(b.begin(), b.end(), a[i].first) - b.begin() + 1;
        int y = lower_bound(b.begin(), b.end(), a[i].second) - b.begin() + 1;
        c[i].first = n - x + 1;
        c[i].second = n - y + 1;
    }

    for (int i = 1; i <= q; i++)
        {
        int x = lower_bound(b.begin(), b.end(), d[i].l) - b.begin() + 1;
        int y = lower_bound(b.begin(), b.end(), d[i].r) - b.begin() + 1;
        d[i].l = n - x + 1;
        d[i].r = n - y + 1;
    }

    sort(d.begin() + 1, d.end(), cmp1);

    int t = 1;
    for (int i = 1; i <= q; i++)
    {
        while (t <= n and a[t].first + a[t].second >= d[i].z)
        {
            update(c[t].first, c[t].second, 1);
            t++;
        }
        kq[d[i].id] = get(d[i].l, d[i].r);
    }

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

• Subtask 1: 0 / 2
• Subtask 2: 0 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57