oj.uz

답안 #674241

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
674241 2022-12-23T14:03:51 Z tibinyte 별자리 3 (JOI20_constellation3) C++17
100 / 100
 733 ms 152232 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
struct bit
{
    vector<int> b;
    void resize(int n)
    {
        b = vector<int>(n + 2);
    }
    void update(int pos, int val)
    {
        int n = (int)b.size() - 1;
        for (int i = pos; i <= n; i += i & (-i))
        {
            b[i] += val;
        }
    }
    int query(int pos)
    {
        int ans = 0;
        for (int i = pos; i; i -= i & (-i))
        {
            ans += b[i];
        }
        return ans;
    }
    void update(int st, int dr, int val)
    {
        update(st, val);
        update(dr + 1, -val);
    }
};
struct rmq
{
    vector<vector<pair<int, int>>> rmq;
    vector<int> lg;
    void build(vector<int> a, int n)
    {
        lg = vector<int>(n + 1);
        for (int i = 2; i <= n; ++i)
        {
            lg[i] = lg[i / 2] + 1;
        }
        rmq = vector<vector<pair<int, int>>>(n + 1, vector<pair<int, int>>(lg[n] + 1));
        for (int i = 1; i <= n; ++i)
        {
            rmq[i][0] = {a[i], i};
        }
        for (int j = 1; j <= lg[n]; ++j)
        {
            for (int i = 1; i + (1 << j) - 1 <= n; ++i)
            {
                rmq[i][j] = min(rmq[i][j - 1], rmq[i + (1 << (j - 1))][j - 1]);
            }
        }
    }
    pair<int, int> query(int st, int dr)
    {
        int pow_2 = lg[dr - st + 1];
        return min(rmq[st][pow_2], rmq[dr - (1 << pow_2) + 1][pow_2]);
    }
};
struct cartesian
{
    vector<int> a;
    vector<vector<int>> g;
    vector<vector<pair<int, int>>> stars;
    vector<vector<int>> jump;
    vector<int> tin;
    vector<int> tout;
    vector<int> dp;
    int p = 0;
    int root = 0;
    int max_jump;
    void build(vector<int> _a, int n)
    {
        a = _a;
        dp = tin = tout = vector<int>(n + 1);
        g = vector<vector<int>>(n + 1);
        rmq t;
        t.build(a, n);
        max_jump = t.lg[n];
        jump = vector<vector<int>>(n + 1, vector<int>(max_jump + 1));
        stars = vector<vector<pair<int, int>>>(n + 1);
        function<void(int, int, int)> construct = [&](int st, int dr, int parent)
        {
            pair<int, int> qui = t.query(st, dr);
            if (!root)
            {
                root = qui.second;
            }
            if (parent != 0)
            {
                g[parent].push_back(qui.second);
                g[qui.second].push_back(parent);
                jump[qui.second][0] = parent;
            }
            else
            {
                jump[qui.second][0] = qui.second;
            }
            for (int i = 1; i <= max_jump; ++i)
            {
                jump[qui.second][i] = jump[jump[qui.second][i - 1]][i - 1];
            }
            tin[qui.second] = ++p;
            if (qui.second != st)
            {
                construct(st, qui.second - 1, qui.second);
            }
            if (qui.second != dr)
            {
                construct(qui.second + 1, dr, qui.second);
            }
            tout[qui.second] = ++p;
        };
        construct(1, n, 0);
    }
    void insert(int node, int h, int coef)
    {
        int qui = node;
        for (int i = max_jump; i >= 0; --i)
        {
            if (a[jump[node][i]] >= h)
            {
                node = jump[node][i];
            }
        }
        stars[node].push_back({qui, coef});
    }
    int solve()
    {
        bit tree;
        bit tree2;
        tree.resize(p);
        tree2.resize(p);
        function<void(int, int)> dfs = [&](int node, int parent)
        {
            for (auto i : g[node])
            {
                if (i != parent)
                {
                    dfs(i, node);
                }
            }
            int sum = 0;
            for (auto i : g[node])
            {
                if (i != parent)
                {
                    sum += dp[i];
                }
            }
 
            tree.update(tin[node], tout[node], sum);
            dp[node] = sum;
            for (auto chain : stars[node])
            {
                dp[node] = max(dp[node], chain.second + tree.query(tin[chain.first]) - tree2.query(tin[chain.first]));
            }
            tree2.update(tin[node], tout[node], dp[node]);
        };
        dfs(root, 0);
        return dp[root];
    }
};
int32_t main()
{
    cin.tie(nullptr)->sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> a(n + 1);
    for (int i = 1; i <= n; ++i)
    {
        cin >> a[i];
        a[i] = n - a[i];
    }
    cartesian t;
    t.build(a, n);
    int m;
    cin >> m;
    int sum = 0;
    for (int i = 1; i <= m; ++i)
    {
        int qui, wh, coef;
        cin >> qui >> wh >> coef;
        wh = n - wh + 1;
        sum += coef;
        t.insert(qui, wh, coef);
    }
    cout << sum - t.solve();
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 2 ms 1108 KB Output is correct
26 Correct 3 ms 1236 KB Output is correct
27 Correct 2 ms 1108 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1236 KB Output is correct
31 Correct 2 ms 1108 KB Output is correct
32 Correct 4 ms 1364 KB Output is correct
33 Correct 3 ms 1364 KB Output is correct
34 Correct 3 ms 1236 KB Output is correct
35 Correct 2 ms 1236 KB Output is correct
36 Correct 2 ms 1280 KB Output is correct
37 Correct 2 ms 1364 KB Output is correct
38 Correct 2 ms 1492 KB Output is correct
39 Correct 2 ms 1108 KB Output is correct
40 Correct 3 ms 1364 KB Output is correct
41 Correct 2 ms 1236 KB Output is correct
42 Correct 3 ms 1236 KB Output is correct
43 Correct 3 ms 1364 KB Output is correct
44 Correct 2 ms 1108 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 1108 KB Output is correct
24 Correct 2 ms 1108 KB Output is correct
25 Correct 2 ms 1108 KB Output is correct
26 Correct 3 ms 1236 KB Output is correct
27 Correct 2 ms 1108 KB Output is correct
28 Correct 2 ms 1108 KB Output is correct
29 Correct 2 ms 1108 KB Output is correct
30 Correct 3 ms 1236 KB Output is correct
31 Correct 2 ms 1108 KB Output is correct
32 Correct 4 ms 1364 KB Output is correct
33 Correct 3 ms 1364 KB Output is correct
34 Correct 3 ms 1236 KB Output is correct
35 Correct 2 ms 1236 KB Output is correct
36 Correct 2 ms 1280 KB Output is correct
37 Correct 2 ms 1364 KB Output is correct
38 Correct 2 ms 1492 KB Output is correct
39 Correct 2 ms 1108 KB Output is correct
40 Correct 3 ms 1364 KB Output is correct
41 Correct 2 ms 1236 KB Output is correct
42 Correct 3 ms 1236 KB Output is correct
43 Correct 3 ms 1364 KB Output is correct
44 Correct 2 ms 1108 KB Output is correct
45 Correct 379 ms 127192 KB Output is correct
46 Correct 378 ms 125888 KB Output is correct
47 Correct 384 ms 123412 KB Output is correct
48 Correct 379 ms 127828 KB Output is correct
49 Correct 383 ms 122880 KB Output is correct
50 Correct 352 ms 123116 KB Output is correct
51 Correct 402 ms 123184 KB Output is correct
52 Correct 364 ms 125900 KB Output is correct
53 Correct 421 ms 126180 KB Output is correct
54 Correct 701 ms 144056 KB Output is correct
55 Correct 731 ms 136260 KB Output is correct
56 Correct 679 ms 132892 KB Output is correct
57 Correct 697 ms 129788 KB Output is correct
58 Correct 552 ms 134028 KB Output is correct
59 Correct 498 ms 132808 KB Output is correct
60 Correct 308 ms 152232 KB Output is correct
61 Correct 360 ms 127696 KB Output is correct
62 Correct 673 ms 141636 KB Output is correct
63 Correct 375 ms 125672 KB Output is correct
64 Correct 359 ms 123096 KB Output is correct
65 Correct 733 ms 143900 KB Output is correct
66 Correct 343 ms 123908 KB Output is correct