oj.uz

답안 #361926

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
361926 2021-02-01T08:16:18 Z RyoPham Bulldozer (JOI17_bulldozer) C++14
100 / 100
 850 ms 33792 KB 
#define taskname "test"

#include <bits/stdc++.h>

using namespace std;

#define sz(x) (int)x.size()
#define fi first
#define se second

typedef long long lli;
typedef pair<int, int> pii;

const int maxn = 2005;

struct segment_tree
{
    lli total[maxn * 4];
    lli max_pref[maxn * 4], max_suff[maxn * 4], max_sub[maxn * 4];

    void update(int x, int l, int r, int p, int k)
    {
        if(l == r)
        {
            total[x] = k;
            max_sub[x] = max_pref[x] = max_suff[x] = max(0, k);
            return;
        }
        int mid = (l + r) / 2;
        if(p <= mid) update(x * 2, l, mid, p, k);
        else update(x * 2 + 1, mid + 1, r, p, k);
        total[x] = total[x * 2] + total[x * 2 + 1];
        max_pref[x] = max(max_pref[x * 2], total[x * 2] + max_pref[x * 2 + 1]);
        max_suff[x] = max(max_suff[x * 2 + 1], total[x * 2 + 1] + max_suff[x * 2]);
        max_sub[x] = max(max(max_sub[x * 2], max_sub[x * 2 + 1]),
                         max_suff[x * 2] + max_pref[x * 2 + 1]);
    }

    lli get_max_sub()
    {
        return max_sub[1];
    }
} tree;

struct point
{
    int x, y;

    point() {}
    point(int _x, int _y) : x(_x), y(_y) {}

    bool operator <(const point&other) const
    {
        if(y == other.y) return x < other.x;
        return y > other.y;
    }
};

struct frac
{
    int a, b;

    frac() {}
    frac(int _a, int _b)
    {
        a = _a;
        b = _b;
    }

    bool operator <(const frac&other) const
    {
        return a * 1LL * other.b < b * 1LL * other.a;
    }

    bool operator ==(const frac&other) const
    {
        return a * 1LL * other.b == b * 1LL * other.a;
    }
};

int n;
pair<point, int> a[maxn];

int pos[maxn];
vector<pair<frac, pii>> events;

void read_input()
{
    cin >> n;
    for(int i = 1; i <= n; ++i)
    {
        int x, y, w;
        cin >> x >> y >> w;
        a[i] = make_pair(point(x, y), w);
    }
}

void init()
{
    sort(a + 1, a + n + 1);
    for(int i = 1; i <= n; ++i)
    {
        tree.update(1, 1, n, i, a[i].se);
        pos[i] = i;
    }
    for(int i = 1; i <= n; ++i)
        for(int j = i + 1; j <= n; ++j)
            if(a[i].fi.y != a[j].fi.y)
            {
                int dx = a[j].fi.x - a[i].fi.x;
                int dy = a[i].fi.y - a[j].fi.y;
                events.push_back(make_pair(frac(dx, dy), pii(i, j)));
            }
    sort(events.begin(), events.end());
}

void solve()
{
    lli ans = tree.get_max_sub();
    for(int i = 0; i < sz(events); )
    {
        int j = i + 1;
        while(j < sz(events) && events[i].fi == events[j].fi)
            ++j;
        for(; i < j; ++i)
        {
            int p = events[i].se.fi, q = events[i].se.se;
            tree.update(1, 1, n, pos[p], a[q].se);
            tree.update(1, 1, n, pos[q], a[p].se);
            swap(pos[p], pos[q]);
        }
        ans = max(ans, tree.get_max_sub());
    }
    cout << ans << '\n';
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    read_input();
    init();
    solve();
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 620 KB Output is correct
22 Correct 2 ms 620 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 2 ms 664 KB Output is correct
25 Correct 2 ms 620 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 2 ms 620 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 620 KB Output is correct
31 Correct 2 ms 620 KB Output is correct
32 Correct 2 ms 620 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 620 KB Output is correct
22 Correct 2 ms 620 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 2 ms 664 KB Output is correct
25 Correct 2 ms 620 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 2 ms 620 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 620 KB Output is correct
31 Correct 2 ms 620 KB Output is correct
32 Correct 2 ms 620 KB Output is correct
33 Correct 835 ms 33620 KB Output is correct
34 Correct 831 ms 33624 KB Output is correct
35 Correct 808 ms 33612 KB Output is correct
36 Correct 821 ms 33612 KB Output is correct
37 Correct 826 ms 33612 KB Output is correct
38 Correct 826 ms 33624 KB Output is correct
39 Correct 812 ms 33612 KB Output is correct
40 Correct 819 ms 33624 KB Output is correct
41 Correct 817 ms 33624 KB Output is correct
42 Correct 825 ms 33612 KB Output is correct
43 Correct 809 ms 33624 KB Output is correct
44 Correct 815 ms 33792 KB Output is correct
45 Correct 801 ms 33612 KB Output is correct
46 Correct 810 ms 33740 KB Output is correct
47 Correct 803 ms 33612 KB Output is correct
48 Correct 815 ms 33624 KB Output is correct
49 Correct 809 ms 33620 KB Output is correct
50 Correct 816 ms 33612 KB Output is correct
51 Correct 809 ms 33624 KB Output is correct
52 Correct 815 ms 33624 KB Output is correct
53 Correct 808 ms 33620 KB Output is correct
54 Correct 821 ms 33624 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 620 KB Output is correct
22 Correct 2 ms 620 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 2 ms 664 KB Output is correct
25 Correct 2 ms 620 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 2 ms 620 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 620 KB Output is correct
31 Correct 2 ms 620 KB Output is correct
32 Correct 2 ms 620 KB Output is correct
33 Correct 835 ms 33620 KB Output is correct
34 Correct 831 ms 33624 KB Output is correct
35 Correct 808 ms 33612 KB Output is correct
36 Correct 821 ms 33612 KB Output is correct
37 Correct 826 ms 33612 KB Output is correct
38 Correct 826 ms 33624 KB Output is correct
39 Correct 812 ms 33612 KB Output is correct
40 Correct 819 ms 33624 KB Output is correct
41 Correct 817 ms 33624 KB Output is correct
42 Correct 825 ms 33612 KB Output is correct
43 Correct 809 ms 33624 KB Output is correct
44 Correct 815 ms 33792 KB Output is correct
45 Correct 801 ms 33612 KB Output is correct
46 Correct 810 ms 33740 KB Output is correct
47 Correct 803 ms 33612 KB Output is correct
48 Correct 815 ms 33624 KB Output is correct
49 Correct 809 ms 33620 KB Output is correct
50 Correct 816 ms 33612 KB Output is correct
51 Correct 809 ms 33624 KB Output is correct
52 Correct 815 ms 33624 KB Output is correct
53 Correct 808 ms 33620 KB Output is correct
54 Correct 821 ms 33624 KB Output is correct
55 Correct 815 ms 33612 KB Output is correct
56 Correct 824 ms 33620 KB Output is correct
57 Correct 828 ms 33624 KB Output is correct
58 Correct 838 ms 33624 KB Output is correct
59 Correct 827 ms 33612 KB Output is correct
60 Correct 838 ms 33596 KB Output is correct
61 Correct 821 ms 33612 KB Output is correct
62 Correct 829 ms 33612 KB Output is correct
63 Correct 825 ms 33596 KB Output is correct
64 Correct 814 ms 33612 KB Output is correct
65 Correct 818 ms 33620 KB Output is correct
66 Correct 847 ms 33620 KB Output is correct
67 Correct 816 ms 33624 KB Output is correct
68 Correct 825 ms 33612 KB Output is correct
69 Correct 817 ms 33624 KB Output is correct
70 Correct 823 ms 33624 KB Output is correct
71 Correct 831 ms 33620 KB Output is correct
72 Correct 820 ms 33612 KB Output is correct
73 Correct 824 ms 33624 KB Output is correct
74 Correct 840 ms 33624 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 620 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 2 ms 620 KB Output is correct
21 Correct 2 ms 620 KB Output is correct
22 Correct 2 ms 620 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 3 ms 620 KB Output is correct
25 Correct 2 ms 620 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 2 ms 620 KB Output is correct
37 Correct 2 ms 620 KB Output is correct
38 Correct 2 ms 620 KB Output is correct
39 Correct 2 ms 664 KB Output is correct
40 Correct 2 ms 620 KB Output is correct
41 Correct 2 ms 620 KB Output is correct
42 Correct 2 ms 620 KB Output is correct
43 Correct 2 ms 620 KB Output is correct
44 Correct 2 ms 620 KB Output is correct
45 Correct 2 ms 620 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 2 ms 620 KB Output is correct
48 Correct 835 ms 33620 KB Output is correct
49 Correct 831 ms 33624 KB Output is correct
50 Correct 808 ms 33612 KB Output is correct
51 Correct 821 ms 33612 KB Output is correct
52 Correct 826 ms 33612 KB Output is correct
53 Correct 826 ms 33624 KB Output is correct
54 Correct 812 ms 33612 KB Output is correct
55 Correct 819 ms 33624 KB Output is correct
56 Correct 817 ms 33624 KB Output is correct
57 Correct 825 ms 33612 KB Output is correct
58 Correct 809 ms 33624 KB Output is correct
59 Correct 815 ms 33792 KB Output is correct
60 Correct 801 ms 33612 KB Output is correct
61 Correct 810 ms 33740 KB Output is correct
62 Correct 803 ms 33612 KB Output is correct
63 Correct 815 ms 33624 KB Output is correct
64 Correct 809 ms 33620 KB Output is correct
65 Correct 816 ms 33612 KB Output is correct
66 Correct 809 ms 33624 KB Output is correct
67 Correct 815 ms 33624 KB Output is correct
68 Correct 808 ms 33620 KB Output is correct
69 Correct 821 ms 33624 KB Output is correct
70 Correct 815 ms 33612 KB Output is correct
71 Correct 824 ms 33620 KB Output is correct
72 Correct 828 ms 33624 KB Output is correct
73 Correct 838 ms 33624 KB Output is correct
74 Correct 827 ms 33612 KB Output is correct
75 Correct 838 ms 33596 KB Output is correct
76 Correct 821 ms 33612 KB Output is correct
77 Correct 829 ms 33612 KB Output is correct
78 Correct 825 ms 33596 KB Output is correct
79 Correct 814 ms 33612 KB Output is correct
80 Correct 818 ms 33620 KB Output is correct
81 Correct 847 ms 33620 KB Output is correct
82 Correct 816 ms 33624 KB Output is correct
83 Correct 825 ms 33612 KB Output is correct
84 Correct 817 ms 33624 KB Output is correct
85 Correct 823 ms 33624 KB Output is correct
86 Correct 831 ms 33620 KB Output is correct
87 Correct 820 ms 33612 KB Output is correct
88 Correct 824 ms 33624 KB Output is correct
89 Correct 840 ms 33624 KB Output is correct
90 Correct 829 ms 33624 KB Output is correct
91 Correct 817 ms 33608 KB Output is correct
92 Correct 822 ms 33632 KB Output is correct
93 Correct 815 ms 33612 KB Output is correct
94 Correct 819 ms 33624 KB Output is correct
95 Correct 824 ms 33612 KB Output is correct
96 Correct 822 ms 33596 KB Output is correct
97 Correct 819 ms 33560 KB Output is correct
98 Correct 815 ms 33612 KB Output is correct
99 Correct 816 ms 33624 KB Output is correct
100 Correct 748 ms 33624 KB Output is correct
101 Correct 757 ms 33752 KB Output is correct
102 Correct 720 ms 33624 KB Output is correct
103 Correct 717 ms 33612 KB Output is correct
104 Correct 722 ms 33612 KB Output is correct
105 Correct 764 ms 33612 KB Output is correct
106 Correct 768 ms 33612 KB Output is correct
107 Correct 770 ms 33624 KB Output is correct
108 Correct 755 ms 33624 KB Output is correct
109 Correct 754 ms 33624 KB Output is correct
110 Correct 743 ms 33496 KB Output is correct
111 Correct 746 ms 33484 KB Output is correct
112 Correct 748 ms 33596 KB Output is correct
113 Correct 747 ms 33484 KB Output is correct
114 Correct 747 ms 33484 KB Output is correct
115 Correct 744 ms 33612 KB Output is correct
116 Correct 746 ms 33624 KB Output is correct
117 Correct 745 ms 33484 KB Output is correct
118 Correct 738 ms 33496 KB Output is correct
119 Correct 742 ms 33632 KB Output is correct
120 Correct 1 ms 364 KB Output is correct
121 Correct 1 ms 364 KB Output is correct
122 Correct 850 ms 33620 KB Output is correct
123 Correct 836 ms 33624 KB Output is correct
124 Correct 845 ms 33612 KB Output is correct
125 Correct 822 ms 33612 KB Output is correct
126 Correct 816 ms 33612 KB Output is correct
127 Correct 827 ms 33624 KB Output is correct
128 Correct 817 ms 33596 KB Output is correct
129 Correct 819 ms 33624 KB Output is correct
130 Correct 832 ms 33612 KB Output is correct
131 Correct 814 ms 33624 KB Output is correct
132 Correct 816 ms 33596 KB Output is correct
133 Correct 814 ms 33624 KB Output is correct