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답안 #265451

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
265451 2020-08-14T21:00:58 Z islingr Bulldozer (JOI17_bulldozer) C++17
100 / 100
 1616 ms 108184 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1 << 11;
using ll = int64_t;
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 pos[x] < pos[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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 1 ms 896 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

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 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 4 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 4 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 4 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 800 KB Output is correct
24 Correct 4 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 4 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 4 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 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 4 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 4 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 4 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 800 KB Output is correct
24 Correct 4 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 4 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 4 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1455 ms 94592 KB Output is correct
34 Correct 1455 ms 94572 KB Output is correct
35 Correct 1424 ms 94536 KB Output is correct
36 Correct 1417 ms 94636 KB Output is correct
37 Correct 1439 ms 94652 KB Output is correct
38 Correct 1419 ms 94636 KB Output is correct
39 Correct 1524 ms 94596 KB Output is correct
40 Correct 1422 ms 94712 KB Output is correct
41 Correct 1421 ms 94636 KB Output is correct
42 Correct 1452 ms 94636 KB Output is correct
43 Correct 1412 ms 94612 KB Output is correct
44 Correct 1384 ms 94712 KB Output is correct
45 Correct 1386 ms 94456 KB Output is correct
46 Correct 1429 ms 94712 KB Output is correct
47 Correct 1431 ms 94584 KB Output is correct
48 Correct 1364 ms 94712 KB Output is correct
49 Correct 1381 ms 94584 KB Output is correct
50 Correct 1414 ms 94620 KB Output is correct
51 Correct 1404 ms 94588 KB Output is correct
52 Correct 1395 ms 94572 KB Output is correct
53 Correct 1427 ms 94692 KB Output is correct
54 Correct 1380 ms 94576 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 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 4 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 4 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 4 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 800 KB Output is correct
24 Correct 4 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 4 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 4 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1455 ms 94592 KB Output is correct
34 Correct 1455 ms 94572 KB Output is correct
35 Correct 1424 ms 94536 KB Output is correct
36 Correct 1417 ms 94636 KB Output is correct
37 Correct 1439 ms 94652 KB Output is correct
38 Correct 1419 ms 94636 KB Output is correct
39 Correct 1524 ms 94596 KB Output is correct
40 Correct 1422 ms 94712 KB Output is correct
41 Correct 1421 ms 94636 KB Output is correct
42 Correct 1452 ms 94636 KB Output is correct
43 Correct 1412 ms 94612 KB Output is correct
44 Correct 1384 ms 94712 KB Output is correct
45 Correct 1386 ms 94456 KB Output is correct
46 Correct 1429 ms 94712 KB Output is correct
47 Correct 1431 ms 94584 KB Output is correct
48 Correct 1364 ms 94712 KB Output is correct
49 Correct 1381 ms 94584 KB Output is correct
50 Correct 1414 ms 94620 KB Output is correct
51 Correct 1404 ms 94588 KB Output is correct
52 Correct 1395 ms 94572 KB Output is correct
53 Correct 1427 ms 94692 KB Output is correct
54 Correct 1380 ms 94576 KB Output is correct
55 Correct 1433 ms 94584 KB Output is correct
56 Correct 1415 ms 94584 KB Output is correct
57 Correct 1431 ms 94708 KB Output is correct
58 Correct 1441 ms 94504 KB Output is correct
59 Correct 1426 ms 94584 KB Output is correct
60 Correct 1428 ms 94584 KB Output is correct
61 Correct 1405 ms 94584 KB Output is correct
62 Correct 1450 ms 94584 KB Output is correct
63 Correct 1428 ms 94612 KB Output is correct
64 Correct 1450 ms 94584 KB Output is correct
65 Correct 1424 ms 94584 KB Output is correct
66 Correct 1467 ms 94528 KB Output is correct
67 Correct 1440 ms 94632 KB Output is correct
68 Correct 1425 ms 94652 KB Output is correct
69 Correct 1495 ms 94516 KB Output is correct
70 Correct 1616 ms 94640 KB Output is correct
71 Correct 1427 ms 94456 KB Output is correct
72 Correct 1452 ms 94456 KB Output is correct
73 Correct 1441 ms 94572 KB Output is correct
74 Correct 1463 ms 94456 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 768 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 768 KB Output is correct
4 Correct 1 ms 768 KB Output is correct
5 Correct 1 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 1 ms 768 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 1 ms 896 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 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 4 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 4 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 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 800 KB Output is correct
39 Correct 4 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 4 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 4 ms 768 KB Output is correct
47 Correct 3 ms 768 KB Output is correct
48 Correct 1455 ms 94592 KB Output is correct
49 Correct 1455 ms 94572 KB Output is correct
50 Correct 1424 ms 94536 KB Output is correct
51 Correct 1417 ms 94636 KB Output is correct
52 Correct 1439 ms 94652 KB Output is correct
53 Correct 1419 ms 94636 KB Output is correct
54 Correct 1524 ms 94596 KB Output is correct
55 Correct 1422 ms 94712 KB Output is correct
56 Correct 1421 ms 94636 KB Output is correct
57 Correct 1452 ms 94636 KB Output is correct
58 Correct 1412 ms 94612 KB Output is correct
59 Correct 1384 ms 94712 KB Output is correct
60 Correct 1386 ms 94456 KB Output is correct
61 Correct 1429 ms 94712 KB Output is correct
62 Correct 1431 ms 94584 KB Output is correct
63 Correct 1364 ms 94712 KB Output is correct
64 Correct 1381 ms 94584 KB Output is correct
65 Correct 1414 ms 94620 KB Output is correct
66 Correct 1404 ms 94588 KB Output is correct
67 Correct 1395 ms 94572 KB Output is correct
68 Correct 1427 ms 94692 KB Output is correct
69 Correct 1380 ms 94576 KB Output is correct
70 Correct 1433 ms 94584 KB Output is correct
71 Correct 1415 ms 94584 KB Output is correct
72 Correct 1431 ms 94708 KB Output is correct
73 Correct 1441 ms 94504 KB Output is correct
74 Correct 1426 ms 94584 KB Output is correct
75 Correct 1428 ms 94584 KB Output is correct
76 Correct 1405 ms 94584 KB Output is correct
77 Correct 1450 ms 94584 KB Output is correct
78 Correct 1428 ms 94612 KB Output is correct
79 Correct 1450 ms 94584 KB Output is correct
80 Correct 1424 ms 94584 KB Output is correct
81 Correct 1467 ms 94528 KB Output is correct
82 Correct 1440 ms 94632 KB Output is correct
83 Correct 1425 ms 94652 KB Output is correct
84 Correct 1495 ms 94516 KB Output is correct
85 Correct 1616 ms 94640 KB Output is correct
86 Correct 1427 ms 94456 KB Output is correct
87 Correct 1452 ms 94456 KB Output is correct
88 Correct 1441 ms 94572 KB Output is correct
89 Correct 1463 ms 94456 KB Output is correct
90 Correct 1419 ms 94712 KB Output is correct
91 Correct 1457 ms 94652 KB Output is correct
92 Correct 1517 ms 94700 KB Output is correct
93 Correct 1447 ms 94700 KB Output is correct
94 Correct 1456 ms 94584 KB Output is correct
95 Correct 1475 ms 94652 KB Output is correct
96 Correct 1428 ms 94712 KB Output is correct
97 Correct 1431 ms 94512 KB Output is correct
98 Correct 1549 ms 94636 KB Output is correct
99 Correct 1428 ms 94584 KB Output is correct
100 Correct 804 ms 103164 KB Output is correct
101 Correct 809 ms 102976 KB Output is correct
102 Correct 824 ms 108184 KB Output is correct
103 Correct 819 ms 103032 KB Output is correct
104 Correct 815 ms 103100 KB Output is correct
105 Correct 973 ms 103152 KB Output is correct
106 Correct 993 ms 103160 KB Output is correct
107 Correct 987 ms 103144 KB Output is correct
108 Correct 990 ms 103152 KB Output is correct
109 Correct 1012 ms 103216 KB Output is correct
110 Correct 979 ms 95084 KB Output is correct
111 Correct 978 ms 94968 KB Output is correct
112 Correct 991 ms 95020 KB Output is correct
113 Correct 959 ms 95316 KB Output is correct
114 Correct 952 ms 95096 KB Output is correct
115 Correct 966 ms 94968 KB Output is correct
116 Correct 948 ms 95096 KB Output is correct
117 Correct 986 ms 95228 KB Output is correct
118 Correct 985 ms 94968 KB Output is correct
119 Correct 981 ms 95080 KB Output is correct
120 Correct 1 ms 512 KB Output is correct
121 Correct 1 ms 512 KB Output is correct
122 Correct 1311 ms 94764 KB Output is correct
123 Correct 1278 ms 94720 KB Output is correct
124 Correct 1290 ms 94712 KB Output is correct
125 Correct 1324 ms 94636 KB Output is correct
126 Correct 1352 ms 94632 KB Output is correct
127 Correct 1322 ms 94588 KB Output is correct
128 Correct 1293 ms 94584 KB Output is correct
129 Correct 1321 ms 94636 KB Output is correct
130 Correct 1360 ms 94580 KB Output is correct
131 Correct 1370 ms 94572 KB Output is correct
132 Correct 1414 ms 94508 KB Output is correct
133 Correct 1390 ms 94576 KB Output is correct