Submission #776994

#	Time	Username	Problem	Language	Result	Execution time	Memory
776994		borisAngelov	Meteors (POI11_met)	C++17	100 / 100	1029 ms	65536 KiB

met

#include <bits/stdc++.h>

using namespace std;

const int maxn = 300005;

int n, m, q;

long long required_sum[maxn];

struct element
{
    int l;
    int r;
    long long x;
};

element queries[maxn];

int answer[maxn];

vector<int> positions[maxn];

long long preffix[maxn];

long long tree[maxn];

vector<int> to_clear;

void update(int pos, long long val)
{
    for (int i = pos; i <= m; i += (i & (-i)))
    {
        tree[i] += val;
        to_clear.push_back(i);
    }
}

long long query(int pos)
{
    long long result = 0;

    for (int i = pos; i >= 1; i -= (i & (-i)))
    {
        result += tree[i];
    }

    return result;
}

void increase(int l, int r, long long delta)
{
    if (l <= r)
    {
        //preffix[l] += delta;
        //preffix[r + 1] -= delta;

        update(l, +delta);
        update(r + 1, -delta);
    }
    else
    {
        //preffix[1] += delta;
        //preffix[r + 1] -= delta;
        //preffix[l] += delta;

        update(1, +delta);
        update(r + 1, -delta);
        update(l, +delta);
    }
}

void divide(int l, int r, vector<int>& active)
{
    if (l > r)
    {
        return;
    }

    int mid = (l + r) / 2;

    for (int i = l; i <= mid; ++i)
    {
        increase(queries[i].l, queries[i].r, queries[i].x);
    }

    vector<int> left_active;
    vector<int> right_active;

    for (int i = 0; i < active.size(); ++i)
    {
        int id = active[i];

        long long curr_sum = 0;

        for (auto pos : positions[id])
        {
            curr_sum += query(pos);

            if (curr_sum >= required_sum[id])
            {
                break;
            }
        }

        if (curr_sum >= required_sum[id])
        {
            answer[id] = mid;
            left_active.push_back(id);
        }
        else
        {
            required_sum[id] -= curr_sum;
            right_active.push_back(id);
        }
    }

    for (auto pos : to_clear)
    {
        tree[pos] = 0LL;
    }

    to_clear.clear();

    divide(l, mid - 1, left_active);
    divide(mid + 1, r, right_active);
}

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n >> m;

    for (int i = 1; i <= m; ++i)
    {
        int id;
        cin >> id;

        positions[id].push_back(i);
    }

    vector<int> active;

    for (int i = 1; i <= n; ++i)
    {
        cin >> required_sum[i];
        answer[i] = -1;
        active.push_back(i);
    }

    cin >> q;

    for (int i = 1; i <= q; ++i)
    {
        cin >> queries[i].l >> queries[i].r >> queries[i].x;
    }

    divide(1, q, active);

    for (int i = 1; i <= n; ++i)
    {
        if (answer[i] == -1)
        {
            cout << "NIE\n";
        }
        else
        {
            cout << answer[i] << "\n";
        }
    }

    return 0;
}

Compilation message (stderr)

met.cpp: In function 'void divide(int, int, std::vector<int>&)':
met.cpp:90:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     for (int i = 0; i < active.size(); ++i)
      |                     ~~^~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 13 / 13
• Subtask 6: 13 / 13
• Subtask 7: 13 / 13
• Subtask 8: 13 / 13