Submission #1156153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156153		tvgk	Examination (JOI19_examination)	C++20	100 / 100	336 ms	47808 KiB

examination

#include<bits/stdc++.h>
using namespace std;
#define task "a"
#define se second
#define fi first
#define ll long long
#define ii pair<ll, ll>
const long mxN = 1e5 + 7;

int n;
ii a[mxN];
vector<int> tree[mxN * 4], sum[mxN * 4];

void Build(int j = 1, int l = 1, int r = n)
{
    if (l == r)
    {
        sum[j].push_back(a[l].fi + a[l].se);
        tree[j].push_back(a[l].se);
        return;
    }

    int mid = (l + r) / 2;
    Build(j * 2, l, mid);
    Build(j * 2 + 1, mid + 1, r);
    merge(sum[j * 2].begin(), sum[j * 2].end(), sum[j * 2 + 1].begin(), sum[j * 2 + 1].end(), back_inserter(sum[j]));
    merge(tree[j * 2].begin(), tree[j * 2].end(), tree[j * 2 + 1].begin(), tree[j * 2 + 1].end(), back_inserter(tree[j]));
}

int Get_sum(int u, int v, int val, int j = 1, int l = 1, int r = n)
{
    if (a[l].fi >= v || a[r].fi < u)
        return 0;

    if (u <= a[l].fi && a[r].fi < v)
        return r - l + 1 - (lower_bound(sum[j].begin(), sum[j].end(), val) - sum[j].begin());

    int mid = (l + r) / 2;
    return Get_sum(u, v, val, j * 2, l, mid) + Get_sum(u, v, val, j * 2 + 1, mid + 1, r);
}

int Get_b(int v, int val, int j = 1, int l = 1, int r = n)
{
    if (a[r].fi < v)
        return 0;

    if (a[l].fi >= v)
        return r - l + 1 - (lower_bound(tree[j].begin(), tree[j].end(), val) - tree[j].begin());

    int mid = (l + r) / 2;
    return Get_b(v, val, j * 2 + 1, mid + 1, r) + Get_b(v, val, j * 2, l, mid);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen(task".INP", "r", stdin);
    //freopen(task".OUT", "w", stdout);

    int q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++)
        cin >> a[i].fi >> a[i].se;
    sort(a + 1, a + n + 1);
    Build();

    for (int i = 1; i <= q; i++)
    {
        int a, b, c;
        cin >> a >> b >> c;

        int tmp = max(a, c - b);
        cout << Get_sum(a, tmp, c) + Get_b(tmp, b) << '\n';
    }
}

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