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Submission #265447

# Submission time Handle Problem Language Result Execution time Memory
265447 2020-08-14T20:56:28 Z islingr Bulldozer (JOI17_bulldozer) C++17
100 / 100
 1597 ms 108152 KB 
#include <bits/stdc++.h>
using namespace std;

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[1 << 13];

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); }

const int N = 1 << 11;
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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 2 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 932 KB Output is correct
10 Correct 2 ms 896 KB Output is correct
11 Correct 1 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 896 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 3 ms 896 KB Output is correct
5 Correct 3 ms 896 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 3 ms 896 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 1 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 1 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 1 ms 640 KB Output is correct
20 Correct 1 ms 640 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 3 ms 896 KB Output is correct
23 Correct 3 ms 896 KB Output is correct
24 Correct 3 ms 896 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 3 ms 896 KB Output is correct
27 Correct 3 ms 896 KB Output is correct
28 Correct 3 ms 948 KB Output is correct
29 Correct 4 ms 1024 KB Output is correct
30 Correct 3 ms 896 KB Output is correct
31 Correct 3 ms 896 KB Output is correct
32 Correct 3 ms 896 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 896 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 3 ms 896 KB Output is correct
5 Correct 3 ms 896 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 3 ms 896 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 1 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 1 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 1 ms 640 KB Output is correct
20 Correct 1 ms 640 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 3 ms 896 KB Output is correct
23 Correct 3 ms 896 KB Output is correct
24 Correct 3 ms 896 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 3 ms 896 KB Output is correct
27 Correct 3 ms 896 KB Output is correct
28 Correct 3 ms 948 KB Output is correct
29 Correct 4 ms 1024 KB Output is correct
30 Correct 3 ms 896 KB Output is correct
31 Correct 3 ms 896 KB Output is correct
32 Correct 3 ms 896 KB Output is correct
33 Correct 1452 ms 94712 KB Output is correct
34 Correct 1482 ms 94840 KB Output is correct
35 Correct 1442 ms 94584 KB Output is correct
36 Correct 1409 ms 94584 KB Output is correct
37 Correct 1428 ms 94712 KB Output is correct
38 Correct 1421 ms 94584 KB Output is correct
39 Correct 1419 ms 94584 KB Output is correct
40 Correct 1453 ms 94584 KB Output is correct
41 Correct 1476 ms 94768 KB Output is correct
42 Correct 1531 ms 94720 KB Output is correct
43 Correct 1388 ms 94712 KB Output is correct
44 Correct 1423 ms 94712 KB Output is correct
45 Correct 1423 ms 94780 KB Output is correct
46 Correct 1462 ms 94712 KB Output is correct
47 Correct 1418 ms 94808 KB Output is correct
48 Correct 1377 ms 94756 KB Output is correct
49 Correct 1376 ms 94712 KB Output is correct
50 Correct 1380 ms 94768 KB Output is correct
51 Correct 1387 ms 94768 KB Output is correct
52 Correct 1426 ms 94652 KB Output is correct
53 Correct 1426 ms 94712 KB Output is correct
54 Correct 1451 ms 94808 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 896 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 3 ms 896 KB Output is correct
5 Correct 3 ms 896 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 3 ms 896 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 1 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 1 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 1 ms 640 KB Output is correct
20 Correct 1 ms 640 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 3 ms 896 KB Output is correct
23 Correct 3 ms 896 KB Output is correct
24 Correct 3 ms 896 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 3 ms 896 KB Output is correct
27 Correct 3 ms 896 KB Output is correct
28 Correct 3 ms 948 KB Output is correct
29 Correct 4 ms 1024 KB Output is correct
30 Correct 3 ms 896 KB Output is correct
31 Correct 3 ms 896 KB Output is correct
32 Correct 3 ms 896 KB Output is correct
33 Correct 1452 ms 94712 KB Output is correct
34 Correct 1482 ms 94840 KB Output is correct
35 Correct 1442 ms 94584 KB Output is correct
36 Correct 1409 ms 94584 KB Output is correct
37 Correct 1428 ms 94712 KB Output is correct
38 Correct 1421 ms 94584 KB Output is correct
39 Correct 1419 ms 94584 KB Output is correct
40 Correct 1453 ms 94584 KB Output is correct
41 Correct 1476 ms 94768 KB Output is correct
42 Correct 1531 ms 94720 KB Output is correct
43 Correct 1388 ms 94712 KB Output is correct
44 Correct 1423 ms 94712 KB Output is correct
45 Correct 1423 ms 94780 KB Output is correct
46 Correct 1462 ms 94712 KB Output is correct
47 Correct 1418 ms 94808 KB Output is correct
48 Correct 1377 ms 94756 KB Output is correct
49 Correct 1376 ms 94712 KB Output is correct
50 Correct 1380 ms 94768 KB Output is correct
51 Correct 1387 ms 94768 KB Output is correct
52 Correct 1426 ms 94652 KB Output is correct
53 Correct 1426 ms 94712 KB Output is correct
54 Correct 1451 ms 94808 KB Output is correct
55 Correct 1435 ms 94668 KB Output is correct
56 Correct 1501 ms 94624 KB Output is correct
57 Correct 1475 ms 94712 KB Output is correct
58 Correct 1505 ms 94712 KB Output is correct
59 Correct 1474 ms 94740 KB Output is correct
60 Correct 1597 ms 94708 KB Output is correct
61 Correct 1444 ms 94600 KB Output is correct
62 Correct 1472 ms 94716 KB Output is correct
63 Correct 1596 ms 94704 KB Output is correct
64 Correct 1554 ms 94712 KB Output is correct
65 Correct 1515 ms 94780 KB Output is correct
66 Correct 1478 ms 94708 KB Output is correct
67 Correct 1432 ms 94840 KB Output is correct
68 Correct 1430 ms 94968 KB Output is correct
69 Correct 1442 ms 94968 KB Output is correct
70 Correct 1429 ms 94712 KB Output is correct
71 Correct 1427 ms 94712 KB Output is correct
72 Correct 1437 ms 94844 KB Output is correct
73 Correct 1425 ms 94664 KB Output is correct
74 Correct 1424 ms 94848 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 1024 KB Output is correct
4 Correct 2 ms 1024 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 896 KB Output is correct
7 Correct 1 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 1 ms 932 KB Output is correct
10 Correct 2 ms 896 KB Output is correct
11 Correct 1 ms 640 KB Output is correct
12 Correct 1 ms 640 KB Output is correct
13 Correct 1 ms 640 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 1 ms 640 KB Output is correct
16 Correct 3 ms 896 KB Output is correct
17 Correct 3 ms 896 KB Output is correct
18 Correct 3 ms 896 KB Output is correct
19 Correct 3 ms 896 KB Output is correct
20 Correct 3 ms 896 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 4 ms 896 KB Output is correct
23 Correct 3 ms 896 KB Output is correct
24 Correct 3 ms 896 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 1 ms 640 KB Output is correct
27 Correct 1 ms 640 KB Output is correct
28 Correct 1 ms 640 KB Output is correct
29 Correct 1 ms 768 KB Output is correct
30 Correct 1 ms 640 KB Output is correct
31 Correct 1 ms 640 KB Output is correct
32 Correct 1 ms 640 KB Output is correct
33 Correct 1 ms 640 KB Output is correct
34 Correct 1 ms 640 KB Output is correct
35 Correct 1 ms 640 KB Output is correct
36 Correct 3 ms 896 KB Output is correct
37 Correct 3 ms 896 KB Output is correct
38 Correct 3 ms 896 KB Output is correct
39 Correct 3 ms 896 KB Output is correct
40 Correct 3 ms 896 KB Output is correct
41 Correct 3 ms 896 KB Output is correct
42 Correct 3 ms 896 KB Output is correct
43 Correct 3 ms 948 KB Output is correct
44 Correct 4 ms 1024 KB Output is correct
45 Correct 3 ms 896 KB Output is correct
46 Correct 3 ms 896 KB Output is correct
47 Correct 3 ms 896 KB Output is correct
48 Correct 1452 ms 94712 KB Output is correct
49 Correct 1482 ms 94840 KB Output is correct
50 Correct 1442 ms 94584 KB Output is correct
51 Correct 1409 ms 94584 KB Output is correct
52 Correct 1428 ms 94712 KB Output is correct
53 Correct 1421 ms 94584 KB Output is correct
54 Correct 1419 ms 94584 KB Output is correct
55 Correct 1453 ms 94584 KB Output is correct
56 Correct 1476 ms 94768 KB Output is correct
57 Correct 1531 ms 94720 KB Output is correct
58 Correct 1388 ms 94712 KB Output is correct
59 Correct 1423 ms 94712 KB Output is correct
60 Correct 1423 ms 94780 KB Output is correct
61 Correct 1462 ms 94712 KB Output is correct
62 Correct 1418 ms 94808 KB Output is correct
63 Correct 1377 ms 94756 KB Output is correct
64 Correct 1376 ms 94712 KB Output is correct
65 Correct 1380 ms 94768 KB Output is correct
66 Correct 1387 ms 94768 KB Output is correct
67 Correct 1426 ms 94652 KB Output is correct
68 Correct 1426 ms 94712 KB Output is correct
69 Correct 1451 ms 94808 KB Output is correct
70 Correct 1435 ms 94668 KB Output is correct
71 Correct 1501 ms 94624 KB Output is correct
72 Correct 1475 ms 94712 KB Output is correct
73 Correct 1505 ms 94712 KB Output is correct
74 Correct 1474 ms 94740 KB Output is correct
75 Correct 1597 ms 94708 KB Output is correct
76 Correct 1444 ms 94600 KB Output is correct
77 Correct 1472 ms 94716 KB Output is correct
78 Correct 1596 ms 94704 KB Output is correct
79 Correct 1554 ms 94712 KB Output is correct
80 Correct 1515 ms 94780 KB Output is correct
81 Correct 1478 ms 94708 KB Output is correct
82 Correct 1432 ms 94840 KB Output is correct
83 Correct 1430 ms 94968 KB Output is correct
84 Correct 1442 ms 94968 KB Output is correct
85 Correct 1429 ms 94712 KB Output is correct
86 Correct 1427 ms 94712 KB Output is correct
87 Correct 1437 ms 94844 KB Output is correct
88 Correct 1425 ms 94664 KB Output is correct
89 Correct 1424 ms 94848 KB Output is correct
90 Correct 1410 ms 94784 KB Output is correct
91 Correct 1446 ms 94840 KB Output is correct
92 Correct 1438 ms 94724 KB Output is correct
93 Correct 1426 ms 94712 KB Output is correct
94 Correct 1447 ms 94840 KB Output is correct
95 Correct 1444 ms 94584 KB Output is correct
96 Correct 1487 ms 94768 KB Output is correct
97 Correct 1439 ms 94712 KB Output is correct
98 Correct 1476 ms 94712 KB Output is correct
99 Correct 1435 ms 94768 KB Output is correct
100 Correct 835 ms 103340 KB Output is correct
101 Correct 815 ms 103036 KB Output is correct
102 Correct 807 ms 108152 KB Output is correct
103 Correct 819 ms 103160 KB Output is correct
104 Correct 814 ms 103160 KB Output is correct
105 Correct 979 ms 103376 KB Output is correct
106 Correct 1149 ms 103288 KB Output is correct
107 Correct 960 ms 103212 KB Output is correct
108 Correct 1200 ms 103212 KB Output is correct
109 Correct 1000 ms 103240 KB Output is correct
110 Correct 978 ms 95188 KB Output is correct
111 Correct 961 ms 95096 KB Output is correct
112 Correct 1008 ms 95160 KB Output is correct
113 Correct 963 ms 95224 KB Output is correct
114 Correct 965 ms 95096 KB Output is correct
115 Correct 988 ms 95224 KB Output is correct
116 Correct 976 ms 95224 KB Output is correct
117 Correct 951 ms 95224 KB Output is correct
118 Correct 965 ms 95248 KB Output is correct
119 Correct 969 ms 95120 KB Output is correct
120 Correct 1 ms 640 KB Output is correct
121 Correct 1 ms 640 KB Output is correct
122 Correct 1422 ms 94584 KB Output is correct
123 Correct 1310 ms 94708 KB Output is correct
124 Correct 1318 ms 94636 KB Output is correct
125 Correct 1316 ms 94800 KB Output is correct
126 Correct 1358 ms 94708 KB Output is correct
127 Correct 1289 ms 94768 KB Output is correct
128 Correct 1337 ms 94840 KB Output is correct
129 Correct 1298 ms 94712 KB Output is correct
130 Correct 1350 ms 94840 KB Output is correct
131 Correct 1330 ms 94764 KB Output is correct
132 Correct 1381 ms 94840 KB Output is correct
133 Correct 1309 ms 94708 KB Output is correct