oj.uz

Submission #266454

# Submission time Handle Problem Language Result Execution time Memory
266454 2020-08-15T09:50:44 Z islingr Bulldozer (JOI17_bulldozer) C++17
100 / 100
 1615 ms 108124 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];
			z /= gcd(real(z), imag(z));
			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 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 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 896 KB Output is correct
9 Correct 1 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

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 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 896 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 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 896 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 3 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 3 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 896 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 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 896 KB Output is correct
31 Correct 3 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1477 ms 94584 KB Output is correct
34 Correct 1434 ms 94696 KB Output is correct
35 Correct 1461 ms 94760 KB Output is correct
36 Correct 1463 ms 94584 KB Output is correct
37 Correct 1479 ms 94700 KB Output is correct
38 Correct 1512 ms 94668 KB Output is correct
39 Correct 1464 ms 94712 KB Output is correct
40 Correct 1443 ms 94584 KB Output is correct
41 Correct 1441 ms 94584 KB Output is correct
42 Correct 1437 ms 94612 KB Output is correct
43 Correct 1429 ms 94636 KB Output is correct
44 Correct 1373 ms 94560 KB Output is correct
45 Correct 1380 ms 94712 KB Output is correct
46 Correct 1437 ms 94584 KB Output is correct
47 Correct 1437 ms 94584 KB Output is correct
48 Correct 1396 ms 94712 KB Output is correct
49 Correct 1403 ms 94712 KB Output is correct
50 Correct 1395 ms 94712 KB Output is correct
51 Correct 1390 ms 94640 KB Output is correct
52 Correct 1426 ms 94700 KB Output is correct
53 Correct 1412 ms 94664 KB Output is correct
54 Correct 1384 ms 94836 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 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 896 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 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 896 KB Output is correct
31 Correct 3 ms 768 KB Output is correct
32 Correct 3 ms 768 KB Output is correct
33 Correct 1477 ms 94584 KB Output is correct
34 Correct 1434 ms 94696 KB Output is correct
35 Correct 1461 ms 94760 KB Output is correct
36 Correct 1463 ms 94584 KB Output is correct
37 Correct 1479 ms 94700 KB Output is correct
38 Correct 1512 ms 94668 KB Output is correct
39 Correct 1464 ms 94712 KB Output is correct
40 Correct 1443 ms 94584 KB Output is correct
41 Correct 1441 ms 94584 KB Output is correct
42 Correct 1437 ms 94612 KB Output is correct
43 Correct 1429 ms 94636 KB Output is correct
44 Correct 1373 ms 94560 KB Output is correct
45 Correct 1380 ms 94712 KB Output is correct
46 Correct 1437 ms 94584 KB Output is correct
47 Correct 1437 ms 94584 KB Output is correct
48 Correct 1396 ms 94712 KB Output is correct
49 Correct 1403 ms 94712 KB Output is correct
50 Correct 1395 ms 94712 KB Output is correct
51 Correct 1390 ms 94640 KB Output is correct
52 Correct 1426 ms 94700 KB Output is correct
53 Correct 1412 ms 94664 KB Output is correct
54 Correct 1384 ms 94836 KB Output is correct
55 Correct 1426 ms 94584 KB Output is correct
56 Correct 1424 ms 94572 KB Output is correct
57 Correct 1438 ms 94604 KB Output is correct
58 Correct 1452 ms 94804 KB Output is correct
59 Correct 1432 ms 94716 KB Output is correct
60 Correct 1472 ms 94840 KB Output is correct
61 Correct 1497 ms 94656 KB Output is correct
62 Correct 1480 ms 94640 KB Output is correct
63 Correct 1532 ms 94636 KB Output is correct
64 Correct 1440 ms 94840 KB Output is correct
65 Correct 1495 ms 94640 KB Output is correct
66 Correct 1547 ms 94584 KB Output is correct
67 Correct 1592 ms 94620 KB Output is correct
68 Correct 1494 ms 94640 KB Output is correct
69 Correct 1524 ms 94640 KB Output is correct
70 Correct 1444 ms 94640 KB Output is correct
71 Correct 1615 ms 94636 KB Output is correct
72 Correct 1514 ms 94640 KB Output is correct
73 Correct 1477 ms 94572 KB Output is correct
74 Correct 1600 ms 94640 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 896 KB Output is correct
2 Correct 1 ms 896 KB Output is correct
3 Correct 1 ms 896 KB Output is correct
4 Correct 1 ms 896 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 896 KB Output is correct
9 Correct 1 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 3 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 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 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 896 KB Output is correct
38 Correct 3 ms 768 KB Output is correct
39 Correct 3 ms 768 KB Output is correct
40 Correct 3 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 896 KB Output is correct
46 Correct 3 ms 768 KB Output is correct
47 Correct 3 ms 768 KB Output is correct
48 Correct 1477 ms 94584 KB Output is correct
49 Correct 1434 ms 94696 KB Output is correct
50 Correct 1461 ms 94760 KB Output is correct
51 Correct 1463 ms 94584 KB Output is correct
52 Correct 1479 ms 94700 KB Output is correct
53 Correct 1512 ms 94668 KB Output is correct
54 Correct 1464 ms 94712 KB Output is correct
55 Correct 1443 ms 94584 KB Output is correct
56 Correct 1441 ms 94584 KB Output is correct
57 Correct 1437 ms 94612 KB Output is correct
58 Correct 1429 ms 94636 KB Output is correct
59 Correct 1373 ms 94560 KB Output is correct
60 Correct 1380 ms 94712 KB Output is correct
61 Correct 1437 ms 94584 KB Output is correct
62 Correct 1437 ms 94584 KB Output is correct
63 Correct 1396 ms 94712 KB Output is correct
64 Correct 1403 ms 94712 KB Output is correct
65 Correct 1395 ms 94712 KB Output is correct
66 Correct 1390 ms 94640 KB Output is correct
67 Correct 1426 ms 94700 KB Output is correct
68 Correct 1412 ms 94664 KB Output is correct
69 Correct 1384 ms 94836 KB Output is correct
70 Correct 1426 ms 94584 KB Output is correct
71 Correct 1424 ms 94572 KB Output is correct
72 Correct 1438 ms 94604 KB Output is correct
73 Correct 1452 ms 94804 KB Output is correct
74 Correct 1432 ms 94716 KB Output is correct
75 Correct 1472 ms 94840 KB Output is correct
76 Correct 1497 ms 94656 KB Output is correct
77 Correct 1480 ms 94640 KB Output is correct
78 Correct 1532 ms 94636 KB Output is correct
79 Correct 1440 ms 94840 KB Output is correct
80 Correct 1495 ms 94640 KB Output is correct
81 Correct 1547 ms 94584 KB Output is correct
82 Correct 1592 ms 94620 KB Output is correct
83 Correct 1494 ms 94640 KB Output is correct
84 Correct 1524 ms 94640 KB Output is correct
85 Correct 1444 ms 94640 KB Output is correct
86 Correct 1615 ms 94636 KB Output is correct
87 Correct 1514 ms 94640 KB Output is correct
88 Correct 1477 ms 94572 KB Output is correct
89 Correct 1600 ms 94640 KB Output is correct
90 Correct 1513 ms 94644 KB Output is correct
91 Correct 1485 ms 94684 KB Output is correct
92 Correct 1511 ms 94644 KB Output is correct
93 Correct 1479 ms 94584 KB Output is correct
94 Correct 1595 ms 94640 KB Output is correct
95 Correct 1478 ms 94556 KB Output is correct
96 Correct 1476 ms 94560 KB Output is correct
97 Correct 1445 ms 94584 KB Output is correct
98 Correct 1478 ms 94576 KB Output is correct
99 Correct 1464 ms 94584 KB Output is correct
100 Correct 808 ms 103288 KB Output is correct
101 Correct 847 ms 102904 KB Output is correct
102 Correct 863 ms 108124 KB Output is correct
103 Correct 906 ms 103032 KB Output is correct
104 Correct 864 ms 103004 KB Output is correct
105 Correct 994 ms 103132 KB Output is correct
106 Correct 1000 ms 103088 KB Output is correct
107 Correct 983 ms 103124 KB Output is correct
108 Correct 1030 ms 103152 KB Output is correct
109 Correct 1020 ms 103140 KB Output is correct
110 Correct 983 ms 95096 KB Output is correct
111 Correct 1008 ms 95036 KB Output is correct
112 Correct 961 ms 95236 KB Output is correct
113 Correct 984 ms 95224 KB Output is correct
114 Correct 1167 ms 95012 KB Output is correct
115 Correct 1016 ms 95096 KB Output is correct
116 Correct 1084 ms 94968 KB Output is correct
117 Correct 993 ms 95000 KB Output is correct
118 Correct 974 ms 94940 KB Output is correct
119 Correct 950 ms 95116 KB Output is correct
120 Correct 1 ms 512 KB Output is correct
121 Correct 1 ms 512 KB Output is correct
122 Correct 1338 ms 94644 KB Output is correct
123 Correct 1373 ms 94568 KB Output is correct
124 Correct 1363 ms 94540 KB Output is correct
125 Correct 1414 ms 94704 KB Output is correct
126 Correct 1478 ms 94700 KB Output is correct
127 Correct 1397 ms 94712 KB Output is correct
128 Correct 1327 ms 94712 KB Output is correct
129 Correct 1333 ms 94700 KB Output is correct
130 Correct 1327 ms 94584 KB Output is correct
131 Correct 1369 ms 94724 KB Output is correct
132 Correct 1349 ms 94584 KB Output is correct
133 Correct 1364 ms 94584 KB Output is correct