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답안 #927369

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
927369 2024-02-14T19:11:05 Z DAleksa Bulldozer (JOI17_bulldozer) C++17
80 / 100
 919 ms 35764 KB 
#include <bits/stdc++.h>

using namespace std;

struct point {
    int x;
    int y;
    int w;
    bool operator < (point p) {
        if(x == p.x) return y > p.y;
        return x < p.x;
    }
};

struct frac {
    int p;
    int q;
    frac() { }
    frac(int _p, int _q) { p = _p; q = _q; }
};

struct node {
    long long mx;
    long long pref;
    long long suff;
    long long sum;
};

bool operator < (frac a, frac b) { return a.p * 1LL * b.q < b.p * 1LL * a.q; }
bool operator == (frac a, frac b) { return a.p == b.p && a.q == b.q; }
bool operator != (frac a, frac b) { return a.p != b.p || a.q != b.q; }

const int N = 2010;
int n;
point a[N];
vector<pair<frac, pair<int, int>>> slopes;
int order[N], pos[N];
node st[4 * N];

void update(int index, int l, int r, int x, int val) {
    if(l > r || r < x || x < l) return;
    if(l == r) {
        st[index].mx = st[index].pref = st[index].suff = max(val, 0);
        st[index].sum = val;
        return;
    }
    int mid = (l + r) / 2;
    if(x <= mid) update(2 * index, l, mid, x, val);
    else update(2 * index + 1, mid + 1, r, x, val);
    st[index].mx = max({st[2 * index].mx, st[2 * index + 1].mx, st[2 * index].suff + st[2 * index + 1].pref});
    st[index].pref = max(st[2 * index].pref, st[2 * index].sum + st[2 * index + 1].pref);
    st[index].suff = max(st[2 * index + 1].suff, st[2 * index + 1].sum + st[2 * index].suff);
    st[index].sum = st[2 * index].sum + st[2 * index + 1].sum;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> a[i].x >> a[i].y >> a[i].w;
    for(int i = 1; i <= n; i++) {
        for(int j = i + 1; j <= n; j++) {
            int sign = 1;
            int dx = a[i].x - a[j].x, dy = a[i].y - a[j].y;
            if(dx < 0) sign *= -1;
            if(dy < 0) sign *= -1;
            dx = abs(dx);
            dy = abs(dy);
            int g = __gcd(dx, dy);
            dx /= g;
            dy /= g;
            if(dx != 0) dy *= sign;
            if(a[i] < a[j]) slopes.push_back({frac(dy, dx), {i, j}});
            else slopes.push_back({frac(dy, dx), {j, i}});
        }
    }
    sort(slopes.begin(), slopes.end(), [&](pair<frac, pair<int, int>> x, pair<frac, pair<int, int>> y) {
        if(x.first == y.first) {
            pair<int, int> i = x.second, j = y.second;
            if(i.first == j.first) return a[i.second] < a[j.second];
            return a[i.first] < a[j.first];
        }
        return x.first < y.first;
    });
    for(int i = 1; i <= n; i++) order[i] = i;
    sort(order + 1, order + n + 1, [&](int i, int j) {
        return a[i] < a[j];
    });
    for(int i = 1; i <= n; i++) pos[order[i]] = i;
    for(int i = 1; i <= n; i++) update(1, 1, n, i, a[order[i]].w);
    long long ans = 0;
    pair<frac, pair<int, int>> lst;
    lst.first = frac(-1, -1);
    for(pair<frac, pair<int, int>> slope : slopes) {
        if(slope.first != lst.first) ans = max(ans, st[1].mx);
        {
            int i = slope.second.first, j = slope.second.second;
            if(pos[i] < pos[j]) {
                update(1, 1, n, pos[i], a[order[pos[j]]].w);
                update(1, 1, n, pos[j], a[order[pos[i]]].w);
                swap(order[pos[i]], order[pos[j]]);
                swap(pos[i], pos[j]);
            }
        }
        lst = slope;
    }
    ans = max(ans, st[1].mx);
    cout << ans;
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 2 ms 604 KB Output is correct
29 Correct 2 ms 600 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 2 ms 680 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 2 ms 604 KB Output is correct
29 Correct 2 ms 600 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 2 ms 680 KB Output is correct
33 Correct 862 ms 33452 KB Output is correct
34 Correct 861 ms 35480 KB Output is correct
35 Correct 866 ms 35244 KB Output is correct
36 Correct 861 ms 33900 KB Output is correct
37 Correct 860 ms 33712 KB Output is correct
38 Correct 860 ms 34096 KB Output is correct
39 Correct 869 ms 34372 KB Output is correct
40 Correct 861 ms 33728 KB Output is correct
41 Correct 885 ms 34360 KB Output is correct
42 Correct 860 ms 33452 KB Output is correct
43 Correct 832 ms 34224 KB Output is correct
44 Correct 873 ms 35500 KB Output is correct
45 Correct 834 ms 34892 KB Output is correct
46 Correct 848 ms 33968 KB Output is correct
47 Correct 844 ms 35248 KB Output is correct
48 Correct 832 ms 35252 KB Output is correct
49 Correct 842 ms 33612 KB Output is correct
50 Correct 849 ms 34732 KB Output is correct
51 Correct 828 ms 34992 KB Output is correct
52 Correct 866 ms 34736 KB Output is correct
53 Correct 822 ms 35252 KB Output is correct
54 Correct 821 ms 34732 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 2 ms 604 KB Output is correct
29 Correct 2 ms 600 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 2 ms 680 KB Output is correct
33 Correct 862 ms 33452 KB Output is correct
34 Correct 861 ms 35480 KB Output is correct
35 Correct 866 ms 35244 KB Output is correct
36 Correct 861 ms 33900 KB Output is correct
37 Correct 860 ms 33712 KB Output is correct
38 Correct 860 ms 34096 KB Output is correct
39 Correct 869 ms 34372 KB Output is correct
40 Correct 861 ms 33728 KB Output is correct
41 Correct 885 ms 34360 KB Output is correct
42 Correct 860 ms 33452 KB Output is correct
43 Correct 832 ms 34224 KB Output is correct
44 Correct 873 ms 35500 KB Output is correct
45 Correct 834 ms 34892 KB Output is correct
46 Correct 848 ms 33968 KB Output is correct
47 Correct 844 ms 35248 KB Output is correct
48 Correct 832 ms 35252 KB Output is correct
49 Correct 842 ms 33612 KB Output is correct
50 Correct 849 ms 34732 KB Output is correct
51 Correct 828 ms 34992 KB Output is correct
52 Correct 866 ms 34736 KB Output is correct
53 Correct 822 ms 35252 KB Output is correct
54 Correct 821 ms 34732 KB Output is correct
55 Correct 866 ms 33712 KB Output is correct
56 Correct 860 ms 34800 KB Output is correct
57 Correct 880 ms 35212 KB Output is correct
58 Correct 864 ms 35512 KB Output is correct
59 Correct 857 ms 35764 KB Output is correct
60 Correct 861 ms 34988 KB Output is correct
61 Correct 866 ms 35252 KB Output is correct
62 Correct 892 ms 33708 KB Output is correct
63 Correct 858 ms 33716 KB Output is correct
64 Correct 902 ms 34620 KB Output is correct
65 Correct 857 ms 34604 KB Output is correct
66 Correct 868 ms 34208 KB Output is correct
67 Correct 870 ms 35020 KB Output is correct
68 Correct 919 ms 34992 KB Output is correct
69 Correct 857 ms 34732 KB Output is correct
70 Correct 874 ms 33504 KB Output is correct
71 Correct 859 ms 33960 KB Output is correct
72 Correct 859 ms 34736 KB Output is correct
73 Correct 858 ms 33708 KB Output is correct
74 Correct 855 ms 34480 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 2 ms 600 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 2 ms 604 KB Output is correct
18 Correct 2 ms 604 KB Output is correct
19 Correct 2 ms 600 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 2 ms 604 KB Output is correct
37 Correct 2 ms 604 KB Output is correct
38 Correct 2 ms 604 KB Output is correct
39 Correct 2 ms 604 KB Output is correct
40 Correct 2 ms 604 KB Output is correct
41 Correct 2 ms 604 KB Output is correct
42 Correct 2 ms 604 KB Output is correct
43 Correct 2 ms 604 KB Output is correct
44 Correct 2 ms 600 KB Output is correct
45 Correct 2 ms 604 KB Output is correct
46 Correct 2 ms 604 KB Output is correct
47 Correct 2 ms 680 KB Output is correct
48 Correct 862 ms 33452 KB Output is correct
49 Correct 861 ms 35480 KB Output is correct
50 Correct 866 ms 35244 KB Output is correct
51 Correct 861 ms 33900 KB Output is correct
52 Correct 860 ms 33712 KB Output is correct
53 Correct 860 ms 34096 KB Output is correct
54 Correct 869 ms 34372 KB Output is correct
55 Correct 861 ms 33728 KB Output is correct
56 Correct 885 ms 34360 KB Output is correct
57 Correct 860 ms 33452 KB Output is correct
58 Correct 832 ms 34224 KB Output is correct
59 Correct 873 ms 35500 KB Output is correct
60 Correct 834 ms 34892 KB Output is correct
61 Correct 848 ms 33968 KB Output is correct
62 Correct 844 ms 35248 KB Output is correct
63 Correct 832 ms 35252 KB Output is correct
64 Correct 842 ms 33612 KB Output is correct
65 Correct 849 ms 34732 KB Output is correct
66 Correct 828 ms 34992 KB Output is correct
67 Correct 866 ms 34736 KB Output is correct
68 Correct 822 ms 35252 KB Output is correct
69 Correct 821 ms 34732 KB Output is correct
70 Correct 866 ms 33712 KB Output is correct
71 Correct 860 ms 34800 KB Output is correct
72 Correct 880 ms 35212 KB Output is correct
73 Correct 864 ms 35512 KB Output is correct
74 Correct 857 ms 35764 KB Output is correct
75 Correct 861 ms 34988 KB Output is correct
76 Correct 866 ms 35252 KB Output is correct
77 Correct 892 ms 33708 KB Output is correct
78 Correct 858 ms 33716 KB Output is correct
79 Correct 902 ms 34620 KB Output is correct
80 Correct 857 ms 34604 KB Output is correct
81 Correct 868 ms 34208 KB Output is correct
82 Correct 870 ms 35020 KB Output is correct
83 Correct 919 ms 34992 KB Output is correct
84 Correct 857 ms 34732 KB Output is correct
85 Correct 874 ms 33504 KB Output is correct
86 Correct 859 ms 33960 KB Output is correct
87 Correct 859 ms 34736 KB Output is correct
88 Correct 858 ms 33708 KB Output is correct
89 Correct 855 ms 34480 KB Output is correct
90 Correct 863 ms 33712 KB Output is correct
91 Correct 865 ms 35248 KB Output is correct
92 Correct 864 ms 35248 KB Output is correct
93 Correct 871 ms 33964 KB Output is correct
94 Correct 874 ms 34628 KB Output is correct
95 Correct 870 ms 33468 KB Output is correct
96 Correct 869 ms 33712 KB Output is correct
97 Correct 870 ms 34476 KB Output is correct
98 Correct 865 ms 33592 KB Output is correct
99 Correct 876 ms 34456 KB Output is correct
100 Incorrect 332 ms 35320 KB Output isn't correct
101 Halted 0 ms 0 KB -