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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#533895#7523. Partially Free Mealrikka_lylyTL 0ms3624kbC++203.3kb2024-08-26 16:16:132024-08-26 16:16:13

Judging History

你现在查看的是最新测评结果

  • [2024-08-26 16:16:13]
  • 评测
  • 测评结果:TL
  • 用时:0ms
  • 内存:3624kb
  • [2024-08-26 16:16:13]
  • 提交

answer

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

#define ll long long
#define ull unsigned long long
#define INF 0x3f3f3f3f3f3f3f3f

struct KBIG
{
    int k = 0;
    ll sum = 0;
    priority_queue<int, vector<int>, greater<int>> pq1;
    priority_queue<int> pq2;
    KBIG()
    {
        k = 0;
        sum = 0;
    }
    void insert(int x)
    {
        if(pq1.size() < k)
        {
            pq1.push(x);
            sum += x;
            return;
        }
        pq1.push(x);
        sum += x;
        pq2.push(pq1.top());
        sum -= pq1.top();
        pq1.pop();
    }
    void resetk(int kk)//这个k必须比之前的k大
    {
        k = kk;
        while (!pq2.empty() && pq1.size() < k)
        {
            pq1.push(pq2.top());
            sum += pq2.top();
            pq2.pop();
            return;
        }
    }
    ll getsum()const
    {
        return pq1.size() == k ? sum : -1;
    }
};


void solve()
{
    int n;
    cin >> n;
    vector<int> a0(n + 2), b0(n + 2);
    for (int i = 1; i <= n; i++)
    {
        cin >> a0[i] >> b0[i];
    }
    auto cmp = [&](int x, int y) -> bool
    {
        return b0[x] < b0[y];
    };
    vector<int> temp(n + 2);
    for (int i = 1; i <= n; i++)
    {
        temp[i] = i;
    }
    sort(temp.begin() + 1, temp.end() - 1, cmp);
    vector<int> a(n + 2), b(n + 2);
    for (int i = 1; i <= n; i++)
    {
        a[i] = a0[temp[i]], b[i] = b0[temp[i]];
    }
    vector<int> f(n + 2, -1);
    vector<ll> ans(n + 2, INF);
    f[0] = 1, f[n] = n;
    if(1)//先把ans[n]求出来免得夜长梦多
    {
        ll sum = 0;
        for (int i = 1; i <= n; i++)
        {
            sum += a[i];
        }
        ans[n] = sum + b[n];
    }
    while (1)
    {
        //找一下这一层需要处理那些f,以及其前后已经算出来f的数
        vector<pair<int, pair<int, int>>> vt;
        for (int i = 1, last = 0; i <= n; i++)
        {
            if(f[i] == -1)
                continue;
            if(last + 1 == i)
            {
                last = i;
                continue;
            }
            vt.push_back({(last + i) >> 1, {last, i}});
            last = i;
        }
        if(vt.empty())
            break;
        int p = 1;
        KBIG kb;
        for (auto &[cur, rng] : vt)
        {
            // cerr << cur << " ";
            kb.resetk(cur - 1);
            int l = f[rng.first], r = f[rng.second];
            {
                ll tans = kb.getsum();
                if(tans != -1 && tans + a[p] + b[p] < ans[cur])
                {
                    ans[cur] = tans + a[p] + b[p];
                    f[cur] = p;
                }
            }
            while (p < r)
            {
                kb.insert(a[p++]);
                ll tans = kb.getsum();
                if(tans != -1 && tans + a[p] + b[p] < ans[cur])
                {
                    ans[cur] = tans + a[p] + b[p];
                    f[cur] = p;
                }
            }
        }
        // cerr << endl;
    }
    for (int i = 1; i <= n; i++)
    {
        cout << ans[i] << '\n';
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t = 1;
    while (t--)
    {
        solve();
    }
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3624kb

input:

3
2 5
4 3
3 7

output:

7
11
16

result:

ok 3 lines

Test #2:

score: -100
Time Limit Exceeded

input:

200000
466436993 804989151
660995237 756645598
432103296 703610564
6889895 53276988
873617076 822481192
532911431 126844295
623111499 456772252
937464699 762157133
708503076 786039753
78556972 5436013
582960979 398984169
786333369 325119902
930705057 615928139
924915828 506145001
164984329 208212435...

output:


result: