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Submission #265430

# Submission time Handle Problem Language Result Execution time Memory
265430 2020-08-14T20:29:10 Z islingr Bulldozer (JOI17_bulldozer) C++17
80 / 100
 1545 ms 103128 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1 << 11;
using ll = int64_t;
const ll inf = 1e18;
struct S {
	ll pref, suff, ans, sum;
	S(ll x = 0) : sum{x} { ans = pref = suff = x > 0 ? x : 0; }
	S(const S &l, const S &r) : ans{max(l.ans, r.ans)} {
		pref = max(l.pref, l.sum + r.pref);
		suff = max(l.suff + r.sum, r.suff);
		ans = max(ans, l.suff + r.pref);
		sum = l.sum + r.sum;
	}
} t[N << 1];

int sz = 1;
void update(int p, ll x) { for (t[p += sz] = x; p >>= 1; ) t[p] = {t[p << 1], t[p << 1|1]}; }

#define rep(i, a, b) for (auto i = (a); i < (b); ++i)
#define all(x...) begin(x), end(x)

ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }

using point = complex<ll>;
ll cross(const point &a, const point &b) { return imag(conj(a) * b); }

int w[N], ord[N], pos[N];
point p[N];
vector<int> g[N], line;
bool vis[N];

void dfs(int u) {
	vis[u] = 1; line.push_back(u);
	for (int v : g[u]) if (!vis[v]) dfs(v);
}

pair<point, pair<int, int>> m[N * N];

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	int n; cin >> n; while (sz < n) sz <<= 1;
	rep(i, 0, n) { int x, y; cin >> x >> y >> w[i]; p[i] = {x, y}; ord[i] = i; }
	sort(ord, ord + n, [&](int a, int b) {
		return pair(imag(p[a]), -real(p[a])) < pair(imag(p[b]), -real(p[b]));
	});
	rep(i, 0, n) pos[ord[i]] = i;
	rep(i, 0, n) update(pos[i], w[i]);

	int c = 0;
	rep(i, 0, n) {
		rep(j, i + 1, n) {
			point z = p[i] - p[j];
			ll g = gcd(real(z), imag(z));
			z = {real(z) / g, imag(z) / g};
			if (imag(z) <= 0) z = -z;
			m[c++] = {z, {i, j}};
			m[c++] = {z, {j, i}};
		}
	}
	sort(m, m + c, [&](auto a, auto b) { return cross(a.first, b.first) > 0; });

	ll ans = t[1].ans;
	for (int i = 0, j = 0; i < c; i = j) {
		while (j < c && m[i].first == m[j].first) ++j;
		rep(k, i, j) g[m[k].second.first].push_back(m[k].second.second);
		rep(k, i, j) {
			if (vis[m[k].second.first]) continue;
			line.clear(); dfs(m[k].second.first);
			sort(all(line), [&](int x, int y) { return real(p[x]) < real(p[y]);});
			int s = line.size();
			for (int i = 0; i < s - i - 1; ++i)
				swap(pos[line[i]], pos[line[s - i - 1]]);
			for (int i : line) update(pos[i], w[i]);
		}
		ans = max(ans, t[1].ans);
		rep(k, i, j) g[m[k].second.first].clear(), vis[m[k].second.first] = 0;
	}

	cout << ans << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 2 ms 896 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 2 ms 768 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 0 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 0 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 768 KB Output is correct
2 Correct 3 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 3 ms 768 KB Output is correct
5 Correct 3 ms 768 KB Output is correct
6 Correct 4 ms 768 KB Output is correct
7 Correct 3 ms 768 KB Output is correct
8 Correct 3 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 768 KB Output is correct
22 Correct 3 ms 768 KB Output is correct
23 Correct 3 ms 768 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 4 ms 768 KB Output is correct
26 Correct 3 ms 768 KB Output is correct
27 Correct 3 ms 768 KB Output is correct
28 Correct 3 ms 768 KB Output is correct
29 Correct 3 ms 768 KB Output is correct
30 Correct 3 ms 768 KB Output is correct
31 Correct 3 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 768 KB Output is correct
2 Correct 3 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 3 ms 768 KB Output is correct
5 Correct 3 ms 768 KB Output is correct
6 Correct 4 ms 768 KB Output is correct
7 Correct 3 ms 768 KB Output is correct
8 Correct 3 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 768 KB Output is correct
22 Correct 3 ms 768 KB Output is correct
23 Correct 3 ms 768 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 4 ms 768 KB Output is correct
26 Correct 3 ms 768 KB Output is correct
27 Correct 3 ms 768 KB Output is correct
28 Correct 3 ms 768 KB Output is correct
29 Correct 3 ms 768 KB Output is correct
30 Correct 3 ms 768 KB Output is correct
31 Correct 3 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1529 ms 94584 KB Output is correct
34 Correct 1545 ms 94508 KB Output is correct
35 Correct 1475 ms 94456 KB Output is correct
36 Correct 1447 ms 94460 KB Output is correct
37 Correct 1467 ms 94712 KB Output is correct
38 Correct 1453 ms 94584 KB Output is correct
39 Correct 1451 ms 94584 KB Output is correct
40 Correct 1481 ms 94636 KB Output is correct
41 Correct 1453 ms 94488 KB Output is correct
42 Correct 1484 ms 94456 KB Output is correct
43 Correct 1455 ms 94632 KB Output is correct
44 Correct 1477 ms 94456 KB Output is correct
45 Correct 1359 ms 94648 KB Output is correct
46 Correct 1411 ms 94584 KB Output is correct
47 Correct 1501 ms 94648 KB Output is correct
48 Correct 1437 ms 94712 KB Output is correct
49 Correct 1393 ms 94632 KB Output is correct
50 Correct 1443 ms 94504 KB Output is correct
51 Correct 1397 ms 94576 KB Output is correct
52 Correct 1410 ms 94728 KB Output is correct
53 Correct 1403 ms 94712 KB Output is correct
54 Correct 1438 ms 94600 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 768 KB Output is correct
2 Correct 3 ms 768 KB Output is correct
3 Correct 3 ms 768 KB Output is correct
4 Correct 3 ms 768 KB Output is correct
5 Correct 3 ms 768 KB Output is correct
6 Correct 4 ms 768 KB Output is correct
7 Correct 3 ms 768 KB Output is correct
8 Correct 3 ms 768 KB Output is correct
9 Correct 3 ms 768 KB Output is correct
10 Correct 3 ms 768 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 1 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 1 ms 512 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 768 KB Output is correct
22 Correct 3 ms 768 KB Output is correct
23 Correct 3 ms 768 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 4 ms 768 KB Output is correct
26 Correct 3 ms 768 KB Output is correct
27 Correct 3 ms 768 KB Output is correct
28 Correct 3 ms 768 KB Output is correct
29 Correct 3 ms 768 KB Output is correct
30 Correct 3 ms 768 KB Output is correct
31 Correct 3 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1529 ms 94584 KB Output is correct
34 Correct 1545 ms 94508 KB Output is correct
35 Correct 1475 ms 94456 KB Output is correct
36 Correct 1447 ms 94460 KB Output is correct
37 Correct 1467 ms 94712 KB Output is correct
38 Correct 1453 ms 94584 KB Output is correct
39 Correct 1451 ms 94584 KB Output is correct
40 Correct 1481 ms 94636 KB Output is correct
41 Correct 1453 ms 94488 KB Output is correct
42 Correct 1484 ms 94456 KB Output is correct
43 Correct 1455 ms 94632 KB Output is correct
44 Correct 1477 ms 94456 KB Output is correct
45 Correct 1359 ms 94648 KB Output is correct
46 Correct 1411 ms 94584 KB Output is correct
47 Correct 1501 ms 94648 KB Output is correct
48 Correct 1437 ms 94712 KB Output is correct
49 Correct 1393 ms 94632 KB Output is correct
50 Correct 1443 ms 94504 KB Output is correct
51 Correct 1397 ms 94576 KB Output is correct
52 Correct 1410 ms 94728 KB Output is correct
53 Correct 1403 ms 94712 KB Output is correct
54 Correct 1438 ms 94600 KB Output is correct
55 Correct 1420 ms 94740 KB Output is correct
56 Correct 1419 ms 94584 KB Output is correct
57 Correct 1431 ms 94456 KB Output is correct
58 Correct 1440 ms 94584 KB Output is correct
59 Correct 1438 ms 94756 KB Output is correct
60 Correct 1464 ms 94640 KB Output is correct
61 Correct 1410 ms 94580 KB Output is correct
62 Correct 1482 ms 94576 KB Output is correct
63 Correct 1440 ms 94580 KB Output is correct
64 Correct 1438 ms 94536 KB Output is correct
65 Correct 1432 ms 94584 KB Output is correct
66 Correct 1432 ms 94456 KB Output is correct
67 Correct 1431 ms 94584 KB Output is correct
68 Correct 1449 ms 94652 KB Output is correct
69 Correct 1443 ms 94704 KB Output is correct
70 Correct 1425 ms 94580 KB Output is correct
71 Correct 1440 ms 94584 KB Output is correct
72 Correct 1447 ms 94588 KB Output is correct
73 Correct 1443 ms 94576 KB Output is correct
74 Correct 1466 ms 94640 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 768 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 2 ms 896 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 2 ms 768 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 0 ms 512 KB Output is correct
12 Correct 1 ms 512 KB Output is correct
13 Correct 0 ms 512 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 512 KB Output is correct
16 Correct 4 ms 768 KB Output is correct
17 Correct 3 ms 768 KB Output is correct
18 Correct 3 ms 768 KB Output is correct
19 Correct 3 ms 768 KB Output is correct
20 Correct 3 ms 768 KB Output is correct
21 Correct 4 ms 768 KB Output is correct
22 Correct 3 ms 768 KB Output is correct
23 Correct 3 ms 768 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 3 ms 768 KB Output is correct
26 Correct 1 ms 512 KB Output is correct
27 Correct 1 ms 512 KB Output is correct
28 Correct 1 ms 512 KB Output is correct
29 Correct 1 ms 512 KB Output is correct
30 Correct 1 ms 512 KB Output is correct
31 Correct 1 ms 512 KB Output is correct
32 Correct 1 ms 512 KB Output is correct
33 Correct 1 ms 512 KB Output is correct
34 Correct 1 ms 512 KB Output is correct
35 Correct 1 ms 512 KB Output is correct
36 Correct 3 ms 768 KB Output is correct
37 Correct 3 ms 768 KB Output is correct
38 Correct 3 ms 768 KB Output is correct
39 Correct 3 ms 768 KB Output is correct
40 Correct 4 ms 768 KB Output is correct
41 Correct 3 ms 768 KB Output is correct
42 Correct 3 ms 768 KB Output is correct
43 Correct 3 ms 768 KB Output is correct
44 Correct 3 ms 768 KB Output is correct
45 Correct 3 ms 768 KB Output is correct
46 Correct 3 ms 768 KB Output is correct
47 Correct 3 ms 768 KB Output is correct
48 Correct 1529 ms 94584 KB Output is correct
49 Correct 1545 ms 94508 KB Output is correct
50 Correct 1475 ms 94456 KB Output is correct
51 Correct 1447 ms 94460 KB Output is correct
52 Correct 1467 ms 94712 KB Output is correct
53 Correct 1453 ms 94584 KB Output is correct
54 Correct 1451 ms 94584 KB Output is correct
55 Correct 1481 ms 94636 KB Output is correct
56 Correct 1453 ms 94488 KB Output is correct
57 Correct 1484 ms 94456 KB Output is correct
58 Correct 1455 ms 94632 KB Output is correct
59 Correct 1477 ms 94456 KB Output is correct
60 Correct 1359 ms 94648 KB Output is correct
61 Correct 1411 ms 94584 KB Output is correct
62 Correct 1501 ms 94648 KB Output is correct
63 Correct 1437 ms 94712 KB Output is correct
64 Correct 1393 ms 94632 KB Output is correct
65 Correct 1443 ms 94504 KB Output is correct
66 Correct 1397 ms 94576 KB Output is correct
67 Correct 1410 ms 94728 KB Output is correct
68 Correct 1403 ms 94712 KB Output is correct
69 Correct 1438 ms 94600 KB Output is correct
70 Correct 1420 ms 94740 KB Output is correct
71 Correct 1419 ms 94584 KB Output is correct
72 Correct 1431 ms 94456 KB Output is correct
73 Correct 1440 ms 94584 KB Output is correct
74 Correct 1438 ms 94756 KB Output is correct
75 Correct 1464 ms 94640 KB Output is correct
76 Correct 1410 ms 94580 KB Output is correct
77 Correct 1482 ms 94576 KB Output is correct
78 Correct 1440 ms 94580 KB Output is correct
79 Correct 1438 ms 94536 KB Output is correct
80 Correct 1432 ms 94584 KB Output is correct
81 Correct 1432 ms 94456 KB Output is correct
82 Correct 1431 ms 94584 KB Output is correct
83 Correct 1449 ms 94652 KB Output is correct
84 Correct 1443 ms 94704 KB Output is correct
85 Correct 1425 ms 94580 KB Output is correct
86 Correct 1440 ms 94584 KB Output is correct
87 Correct 1447 ms 94588 KB Output is correct
88 Correct 1443 ms 94576 KB Output is correct
89 Correct 1466 ms 94640 KB Output is correct
90 Correct 1454 ms 94580 KB Output is correct
91 Correct 1479 ms 94716 KB Output is correct
92 Correct 1485 ms 94592 KB Output is correct
93 Correct 1545 ms 94636 KB Output is correct
94 Correct 1453 ms 94456 KB Output is correct
95 Correct 1511 ms 94456 KB Output is correct
96 Correct 1451 ms 94704 KB Output is correct
97 Correct 1470 ms 94648 KB Output is correct
98 Correct 1456 ms 94816 KB Output is correct
99 Correct 1458 ms 94712 KB Output is correct
100 Incorrect 843 ms 103128 KB Output isn't correct
101 Halted 0 ms 0 KB -