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Submission #265424

# Submission time Handle Problem Language Result Execution time Memory
265424 2020-08-14T20:13:31 Z islingr Bulldozer (JOI17_bulldozer) C++17
25 / 100
 2000 ms 152692 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1 << 17;
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); }
struct cmp {
	bool operator()(const point &a, const point &b) const { return cross(a, b) > 0; }
};

map<point, vector<pair<int, int>>, cmp> m;
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);
}

signed 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]);

	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[z].emplace_back(i, j);
			m[z].emplace_back(j, i);
		}
	}

	ll ans = t[1].ans;
	for (auto &[_, d] : m) {
		for (auto &[u, v] : d) g[u].push_back(v);
		for (auto &[_, v] : d) {
			if (vis[v]) continue;
			line.clear(); dfs(v);
			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]);
		}

		for (auto &[_, v] : d) g[v].clear(), vis[v] = 0;
		ans = max(ans, t[1].ans);
	}

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

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11904 KB Output is correct
2 Correct 7 ms 11904 KB Output is correct
3 Correct 8 ms 11904 KB Output is correct
4 Correct 7 ms 11904 KB Output is correct
5 Correct 8 ms 11904 KB Output is correct
6 Correct 7 ms 11904 KB Output is correct
7 Correct 7 ms 11904 KB Output is correct
8 Correct 8 ms 11904 KB Output is correct
9 Correct 8 ms 11904 KB Output is correct
10 Correct 9 ms 11904 KB Output is correct
11 Correct 7 ms 11648 KB Output is correct
12 Correct 8 ms 11648 KB Output is correct
13 Correct 7 ms 11648 KB Output is correct
14 Correct 7 ms 11648 KB Output is correct
15 Correct 8 ms 11648 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 13 ms 12160 KB Output is correct
3 Correct 12 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 11 ms 12160 KB Output is correct
8 Correct 11 ms 12160 KB Output is correct
9 Correct 11 ms 12160 KB Output is correct
10 Correct 11 ms 12160 KB Output is correct
11 Correct 7 ms 11648 KB Output is correct
12 Correct 7 ms 11648 KB Output is correct
13 Correct 7 ms 11648 KB Output is correct
14 Correct 7 ms 11648 KB Output is correct
15 Correct 7 ms 11648 KB Output is correct
16 Correct 7 ms 11648 KB Output is correct
17 Correct 7 ms 11648 KB Output is correct
18 Correct 7 ms 11648 KB Output is correct
19 Correct 7 ms 11648 KB Output is correct
20 Correct 7 ms 11648 KB Output is correct
21 Correct 11 ms 12160 KB Output is correct
22 Correct 11 ms 12160 KB Output is correct
23 Correct 11 ms 12160 KB Output is correct
24 Correct 11 ms 12160 KB Output is correct
25 Correct 11 ms 12160 KB Output is correct
26 Correct 11 ms 12160 KB Output is correct
27 Correct 11 ms 12160 KB Output is correct
28 Correct 11 ms 12160 KB Output is correct
29 Correct 11 ms 12160 KB Output is correct
30 Correct 11 ms 12160 KB Output is correct
31 Correct 11 ms 12160 KB Output is correct
32 Correct 11 ms 12160 KB Output is correct

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 13 ms 12160 KB Output is correct
3 Correct 12 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 11 ms 12160 KB Output is correct
8 Correct 11 ms 12160 KB Output is correct
9 Correct 11 ms 12160 KB Output is correct
10 Correct 11 ms 12160 KB Output is correct
11 Correct 7 ms 11648 KB Output is correct
12 Correct 7 ms 11648 KB Output is correct
13 Correct 7 ms 11648 KB Output is correct
14 Correct 7 ms 11648 KB Output is correct
15 Correct 7 ms 11648 KB Output is correct
16 Correct 7 ms 11648 KB Output is correct
17 Correct 7 ms 11648 KB Output is correct
18 Correct 7 ms 11648 KB Output is correct
19 Correct 7 ms 11648 KB Output is correct
20 Correct 7 ms 11648 KB Output is correct
21 Correct 11 ms 12160 KB Output is correct
22 Correct 11 ms 12160 KB Output is correct
23 Correct 11 ms 12160 KB Output is correct
24 Correct 11 ms 12160 KB Output is correct
25 Correct 11 ms 12160 KB Output is correct
26 Correct 11 ms 12160 KB Output is correct
27 Correct 11 ms 12160 KB Output is correct
28 Correct 11 ms 12160 KB Output is correct
29 Correct 11 ms 12160 KB Output is correct
30 Correct 11 ms 12160 KB Output is correct
31 Correct 11 ms 12160 KB Output is correct
32 Correct 11 ms 12160 KB Output is correct
33 Execution timed out 2092 ms 152692 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 13 ms 12160 KB Output is correct
3 Correct 12 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 11 ms 12160 KB Output is correct
8 Correct 11 ms 12160 KB Output is correct
9 Correct 11 ms 12160 KB Output is correct
10 Correct 11 ms 12160 KB Output is correct
11 Correct 7 ms 11648 KB Output is correct
12 Correct 7 ms 11648 KB Output is correct
13 Correct 7 ms 11648 KB Output is correct
14 Correct 7 ms 11648 KB Output is correct
15 Correct 7 ms 11648 KB Output is correct
16 Correct 7 ms 11648 KB Output is correct
17 Correct 7 ms 11648 KB Output is correct
18 Correct 7 ms 11648 KB Output is correct
19 Correct 7 ms 11648 KB Output is correct
20 Correct 7 ms 11648 KB Output is correct
21 Correct 11 ms 12160 KB Output is correct
22 Correct 11 ms 12160 KB Output is correct
23 Correct 11 ms 12160 KB Output is correct
24 Correct 11 ms 12160 KB Output is correct
25 Correct 11 ms 12160 KB Output is correct
26 Correct 11 ms 12160 KB Output is correct
27 Correct 11 ms 12160 KB Output is correct
28 Correct 11 ms 12160 KB Output is correct
29 Correct 11 ms 12160 KB Output is correct
30 Correct 11 ms 12160 KB Output is correct
31 Correct 11 ms 12160 KB Output is correct
32 Correct 11 ms 12160 KB Output is correct
33 Execution timed out 2092 ms 152692 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11904 KB Output is correct
2 Correct 7 ms 11904 KB Output is correct
3 Correct 8 ms 11904 KB Output is correct
4 Correct 7 ms 11904 KB Output is correct
5 Correct 8 ms 11904 KB Output is correct
6 Correct 7 ms 11904 KB Output is correct
7 Correct 7 ms 11904 KB Output is correct
8 Correct 8 ms 11904 KB Output is correct
9 Correct 8 ms 11904 KB Output is correct
10 Correct 9 ms 11904 KB Output is correct
11 Correct 7 ms 11648 KB Output is correct
12 Correct 8 ms 11648 KB Output is correct
13 Correct 7 ms 11648 KB Output is correct
14 Correct 7 ms 11648 KB Output is correct
15 Correct 8 ms 11648 KB Output is correct
16 Correct 11 ms 12160 KB Output is correct
17 Correct 13 ms 12160 KB Output is correct
18 Correct 12 ms 12160 KB Output is correct
19 Correct 11 ms 12160 KB Output is correct
20 Correct 13 ms 12160 KB Output is correct
21 Correct 11 ms 12160 KB Output is correct
22 Correct 11 ms 12160 KB Output is correct
23 Correct 11 ms 12160 KB Output is correct
24 Correct 11 ms 12160 KB Output is correct
25 Correct 11 ms 12160 KB Output is correct
26 Correct 7 ms 11648 KB Output is correct
27 Correct 7 ms 11648 KB Output is correct
28 Correct 7 ms 11648 KB Output is correct
29 Correct 7 ms 11648 KB Output is correct
30 Correct 7 ms 11648 KB Output is correct
31 Correct 7 ms 11648 KB Output is correct
32 Correct 7 ms 11648 KB Output is correct
33 Correct 7 ms 11648 KB Output is correct
34 Correct 7 ms 11648 KB Output is correct
35 Correct 7 ms 11648 KB Output is correct
36 Correct 11 ms 12160 KB Output is correct
37 Correct 11 ms 12160 KB Output is correct
38 Correct 11 ms 12160 KB Output is correct
39 Correct 11 ms 12160 KB Output is correct
40 Correct 11 ms 12160 KB Output is correct
41 Correct 11 ms 12160 KB Output is correct
42 Correct 11 ms 12160 KB Output is correct
43 Correct 11 ms 12160 KB Output is correct
44 Correct 11 ms 12160 KB Output is correct
45 Correct 11 ms 12160 KB Output is correct
46 Correct 11 ms 12160 KB Output is correct
47 Correct 11 ms 12160 KB Output is correct
48 Execution timed out 2092 ms 152692 KB Time limit exceeded
49 Halted 0 ms 0 KB -