Submission #936958

#	Time	Username	Problem	Language	Result	Execution time	Memory
936958		qwe1rt1yuiop1	Topical (NOI23_topical)	C++14	100 / 100	405 ms	136672 KiB

Main

#include <bits/stdc++.h>
#define int long long
using namespace std;
using pii = pair<int, int>;

void solve()
{
    int n, k;
    cin >> n >> k;
    vector<vector<int>> a(n, vector<int>(k)), b = a;
    for (auto &i : a)
        for (auto &j : i)
            cin >> j;
    for (auto &i : b)
        for (auto &j : i)
            cin >> j;
/*
    if (k == 1)
    {
        vector<pii> v(n);
        for (int i = 0; i < n; ++i)
            v[i].first = a[i][0], v[i].second = b[i][0];
        sort(v.begin(), v.end());
        int cur = 0, ans = 0;
        for (int i = 0; i < n; ++i)
            if (v[i].first <= cur)
            {
                cur += v[i].second;
                ++ans;
            }
        cout << ans << '\n';
        return;
    }
    if (max(n, k) <= 100)
    {
        vector<int> cur(k, 0), flag(n, 0);
        while (1)
        {
            int ok = 0;
            for (int i = 0; i < n; ++i)
                if (!flag[i])
                {
                    int okk = 1;
                    for (int j = 0; j < k; ++j)
                        okk &= cur[j] >= a[i][j];
                    if (okk)
                    {
                        ok = flag[i] = 1;
                        for (int j = 0; j < k; ++j)
                            cur[j] += b[i][j];
                        break;
                    }
                }
            if (!ok)
                break;
        }
        cout << accumulate(flag.begin(), flag.end(), 0LL) << '\n';
        return;
    }
*/
    vector<vector<pii>> v(k);
    for (int i = 0; i < n; ++i)
        for (int j = 0; j < k; ++j)
            v[j].emplace_back(a[i][j], i);
    vector<int> cnt(n, 0), cur(k, 0);
    queue<int> q;
    for (int i = 0; i < k; ++i)
    {
        sort(v[i].begin(), v[i].end());
        reverse(v[i].begin(), v[i].end());
        while (!v[i].empty())
        {
            if (v[i].back().first > cur[i])
                break;
            cnt[v[i].back().second]++;
            if (cnt[v[i].back().second] == k)
                q.emplace(v[i].back().second);
            v[i].pop_back();
        }
    }
    int ans = 0;
    while (!q.empty())
    {
        ++ans;
        int x = q.front();
        q.pop();

        for (int i = 0; i < k; ++i)
        {
            cur[i] += b[x][i];
            while (!v[i].empty())
            {
                if (v[i].back().first > cur[i])
                    break;
                cnt[v[i].back().second]++;
                if (cnt[v[i].back().second] == k)
                    q.emplace(v[i].back().second);
                v[i].pop_back();
            }
        }
    }
    cout << ans << '\n';
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    solve();

    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 28 / 28
• Subtask 3: 21 / 21
• Subtask 4: 39 / 39