oj.uz

답안 #265444

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
265444 2020-08-14T20:48:34 Z islingr Bulldozer (JOI17_bulldozer) C++17
100 / 100
 1523 ms 108280 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1 << 12;
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));
			assert(g != 0);
			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 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 2 ms 1024 KB Output is correct
4 Correct 2 ms 1056 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 2 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 2 ms 1024 KB Output is correct
10 Correct 1 ms 1024 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1024 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 4 ms 1024 KB Output is correct
7 Correct 3 ms 1024 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 4 ms 1024 KB Output is correct
10 Correct 4 ms 896 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 1 ms 800 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 1 ms 764 KB Output is correct
19 Correct 1 ms 768 KB Output is correct
20 Correct 1 ms 768 KB Output is correct
21 Correct 4 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 1024 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 4 ms 896 KB Output is correct
27 Correct 3 ms 1024 KB Output is correct
28 Correct 3 ms 896 KB Output is correct
29 Correct 3 ms 896 KB Output is correct
30 Correct 3 ms 1024 KB Output is correct
31 Correct 4 ms 896 KB Output is correct
32 Correct 4 ms 1024 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1024 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 4 ms 1024 KB Output is correct
7 Correct 3 ms 1024 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 4 ms 1024 KB Output is correct
10 Correct 4 ms 896 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 1 ms 800 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 1 ms 764 KB Output is correct
19 Correct 1 ms 768 KB Output is correct
20 Correct 1 ms 768 KB Output is correct
21 Correct 4 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 1024 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 4 ms 896 KB Output is correct
27 Correct 3 ms 1024 KB Output is correct
28 Correct 3 ms 896 KB Output is correct
29 Correct 3 ms 896 KB Output is correct
30 Correct 3 ms 1024 KB Output is correct
31 Correct 4 ms 896 KB Output is correct
32 Correct 4 ms 1024 KB Output is correct
33 Correct 1459 ms 94968 KB Output is correct
34 Correct 1454 ms 94920 KB Output is correct
35 Correct 1458 ms 94940 KB Output is correct
36 Correct 1438 ms 94968 KB Output is correct
37 Correct 1462 ms 94968 KB Output is correct
38 Correct 1446 ms 94968 KB Output is correct
39 Correct 1461 ms 94800 KB Output is correct
40 Correct 1445 ms 94836 KB Output is correct
41 Correct 1441 ms 94840 KB Output is correct
42 Correct 1486 ms 94968 KB Output is correct
43 Correct 1405 ms 94840 KB Output is correct
44 Correct 1425 ms 94840 KB Output is correct
45 Correct 1381 ms 94840 KB Output is correct
46 Correct 1432 ms 94900 KB Output is correct
47 Correct 1412 ms 94900 KB Output is correct
48 Correct 1456 ms 95004 KB Output is correct
49 Correct 1394 ms 94840 KB Output is correct
50 Correct 1425 ms 94840 KB Output is correct
51 Correct 1389 ms 94972 KB Output is correct
52 Correct 1418 ms 94840 KB Output is correct
53 Correct 1421 ms 94968 KB Output is correct
54 Correct 1393 ms 94840 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1024 KB Output is correct
2 Correct 3 ms 896 KB Output is correct
3 Correct 3 ms 896 KB Output is correct
4 Correct 5 ms 896 KB Output is correct
5 Correct 4 ms 896 KB Output is correct
6 Correct 4 ms 1024 KB Output is correct
7 Correct 3 ms 1024 KB Output is correct
8 Correct 3 ms 896 KB Output is correct
9 Correct 4 ms 1024 KB Output is correct
10 Correct 4 ms 896 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 1 ms 800 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 1 ms 764 KB Output is correct
19 Correct 1 ms 768 KB Output is correct
20 Correct 1 ms 768 KB Output is correct
21 Correct 4 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 1024 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 4 ms 896 KB Output is correct
27 Correct 3 ms 1024 KB Output is correct
28 Correct 3 ms 896 KB Output is correct
29 Correct 3 ms 896 KB Output is correct
30 Correct 3 ms 1024 KB Output is correct
31 Correct 4 ms 896 KB Output is correct
32 Correct 4 ms 1024 KB Output is correct
33 Correct 1459 ms 94968 KB Output is correct
34 Correct 1454 ms 94920 KB Output is correct
35 Correct 1458 ms 94940 KB Output is correct
36 Correct 1438 ms 94968 KB Output is correct
37 Correct 1462 ms 94968 KB Output is correct
38 Correct 1446 ms 94968 KB Output is correct
39 Correct 1461 ms 94800 KB Output is correct
40 Correct 1445 ms 94836 KB Output is correct
41 Correct 1441 ms 94840 KB Output is correct
42 Correct 1486 ms 94968 KB Output is correct
43 Correct 1405 ms 94840 KB Output is correct
44 Correct 1425 ms 94840 KB Output is correct
45 Correct 1381 ms 94840 KB Output is correct
46 Correct 1432 ms 94900 KB Output is correct
47 Correct 1412 ms 94900 KB Output is correct
48 Correct 1456 ms 95004 KB Output is correct
49 Correct 1394 ms 94840 KB Output is correct
50 Correct 1425 ms 94840 KB Output is correct
51 Correct 1389 ms 94972 KB Output is correct
52 Correct 1418 ms 94840 KB Output is correct
53 Correct 1421 ms 94968 KB Output is correct
54 Correct 1393 ms 94840 KB Output is correct
55 Correct 1444 ms 94896 KB Output is correct
56 Correct 1440 ms 94980 KB Output is correct
57 Correct 1467 ms 94776 KB Output is correct
58 Correct 1463 ms 94840 KB Output is correct
59 Correct 1459 ms 94936 KB Output is correct
60 Correct 1451 ms 94788 KB Output is correct
61 Correct 1427 ms 94840 KB Output is correct
62 Correct 1476 ms 94712 KB Output is correct
63 Correct 1444 ms 94792 KB Output is correct
64 Correct 1485 ms 94840 KB Output is correct
65 Correct 1445 ms 94808 KB Output is correct
66 Correct 1445 ms 94936 KB Output is correct
67 Correct 1449 ms 94840 KB Output is correct
68 Correct 1508 ms 94840 KB Output is correct
69 Correct 1459 ms 94896 KB Output is correct
70 Correct 1447 ms 94988 KB Output is correct
71 Correct 1443 ms 94968 KB Output is correct
72 Correct 1449 ms 94840 KB Output is correct
73 Correct 1444 ms 94968 KB Output is correct
74 Correct 1449 ms 94840 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1024 KB Output is correct
2 Correct 1 ms 1024 KB Output is correct
3 Correct 2 ms 1024 KB Output is correct
4 Correct 2 ms 1056 KB Output is correct
5 Correct 1 ms 1024 KB Output is correct
6 Correct 1 ms 1024 KB Output is correct
7 Correct 2 ms 1024 KB Output is correct
8 Correct 1 ms 1024 KB Output is correct
9 Correct 2 ms 1024 KB Output is correct
10 Correct 1 ms 1024 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 3 ms 1024 KB Output is correct
17 Correct 3 ms 896 KB Output is correct
18 Correct 3 ms 896 KB Output is correct
19 Correct 5 ms 896 KB Output is correct
20 Correct 4 ms 896 KB Output is correct
21 Correct 4 ms 1024 KB Output is correct
22 Correct 3 ms 1024 KB Output is correct
23 Correct 3 ms 896 KB Output is correct
24 Correct 4 ms 1024 KB Output is correct
25 Correct 4 ms 896 KB Output is correct
26 Correct 1 ms 768 KB Output is correct
27 Correct 1 ms 768 KB Output is correct
28 Correct 1 ms 768 KB Output is correct
29 Correct 1 ms 768 KB Output is correct
30 Correct 1 ms 768 KB Output is correct
31 Correct 1 ms 800 KB Output is correct
32 Correct 1 ms 768 KB Output is correct
33 Correct 1 ms 764 KB Output is correct
34 Correct 1 ms 768 KB Output is correct
35 Correct 1 ms 768 KB Output is correct
36 Correct 4 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 1024 KB Output is correct
40 Correct 3 ms 896 KB Output is correct
41 Correct 4 ms 896 KB Output is correct
42 Correct 3 ms 1024 KB Output is correct
43 Correct 3 ms 896 KB Output is correct
44 Correct 3 ms 896 KB Output is correct
45 Correct 3 ms 1024 KB Output is correct
46 Correct 4 ms 896 KB Output is correct
47 Correct 4 ms 1024 KB Output is correct
48 Correct 1459 ms 94968 KB Output is correct
49 Correct 1454 ms 94920 KB Output is correct
50 Correct 1458 ms 94940 KB Output is correct
51 Correct 1438 ms 94968 KB Output is correct
52 Correct 1462 ms 94968 KB Output is correct
53 Correct 1446 ms 94968 KB Output is correct
54 Correct 1461 ms 94800 KB Output is correct
55 Correct 1445 ms 94836 KB Output is correct
56 Correct 1441 ms 94840 KB Output is correct
57 Correct 1486 ms 94968 KB Output is correct
58 Correct 1405 ms 94840 KB Output is correct
59 Correct 1425 ms 94840 KB Output is correct
60 Correct 1381 ms 94840 KB Output is correct
61 Correct 1432 ms 94900 KB Output is correct
62 Correct 1412 ms 94900 KB Output is correct
63 Correct 1456 ms 95004 KB Output is correct
64 Correct 1394 ms 94840 KB Output is correct
65 Correct 1425 ms 94840 KB Output is correct
66 Correct 1389 ms 94972 KB Output is correct
67 Correct 1418 ms 94840 KB Output is correct
68 Correct 1421 ms 94968 KB Output is correct
69 Correct 1393 ms 94840 KB Output is correct
70 Correct 1444 ms 94896 KB Output is correct
71 Correct 1440 ms 94980 KB Output is correct
72 Correct 1467 ms 94776 KB Output is correct
73 Correct 1463 ms 94840 KB Output is correct
74 Correct 1459 ms 94936 KB Output is correct
75 Correct 1451 ms 94788 KB Output is correct
76 Correct 1427 ms 94840 KB Output is correct
77 Correct 1476 ms 94712 KB Output is correct
78 Correct 1444 ms 94792 KB Output is correct
79 Correct 1485 ms 94840 KB Output is correct
80 Correct 1445 ms 94808 KB Output is correct
81 Correct 1445 ms 94936 KB Output is correct
82 Correct 1449 ms 94840 KB Output is correct
83 Correct 1508 ms 94840 KB Output is correct
84 Correct 1459 ms 94896 KB Output is correct
85 Correct 1447 ms 94988 KB Output is correct
86 Correct 1443 ms 94968 KB Output is correct
87 Correct 1449 ms 94840 KB Output is correct
88 Correct 1444 ms 94968 KB Output is correct
89 Correct 1449 ms 94840 KB Output is correct
90 Correct 1523 ms 94852 KB Output is correct
91 Correct 1458 ms 94872 KB Output is correct
92 Correct 1454 ms 94772 KB Output is correct
93 Correct 1438 ms 95008 KB Output is correct
94 Correct 1474 ms 94908 KB Output is correct
95 Correct 1485 ms 94780 KB Output is correct
96 Correct 1499 ms 94968 KB Output is correct
97 Correct 1442 ms 94968 KB Output is correct
98 Correct 1489 ms 94776 KB Output is correct
99 Correct 1499 ms 94744 KB Output is correct
100 Correct 823 ms 103544 KB Output is correct
101 Correct 821 ms 103200 KB Output is correct
102 Correct 828 ms 108280 KB Output is correct
103 Correct 823 ms 103288 KB Output is correct
104 Correct 849 ms 103420 KB Output is correct
105 Correct 1010 ms 103544 KB Output is correct
106 Correct 986 ms 103416 KB Output is correct
107 Correct 981 ms 103288 KB Output is correct
108 Correct 988 ms 103416 KB Output is correct
109 Correct 984 ms 103416 KB Output is correct
110 Correct 947 ms 95224 KB Output is correct
111 Correct 966 ms 95224 KB Output is correct
112 Correct 971 ms 95456 KB Output is correct
113 Correct 970 ms 95352 KB Output is correct
114 Correct 980 ms 95352 KB Output is correct
115 Correct 976 ms 95260 KB Output is correct
116 Correct 971 ms 95236 KB Output is correct
117 Correct 967 ms 95352 KB Output is correct
118 Correct 986 ms 95156 KB Output is correct
119 Correct 951 ms 95260 KB Output is correct
120 Correct 1 ms 768 KB Output is correct
121 Correct 1 ms 768 KB Output is correct
122 Correct 1323 ms 94876 KB Output is correct
123 Correct 1299 ms 94968 KB Output is correct
124 Correct 1326 ms 94968 KB Output is correct
125 Correct 1352 ms 94840 KB Output is correct
126 Correct 1320 ms 94944 KB Output is correct
127 Correct 1311 ms 94968 KB Output is correct
128 Correct 1308 ms 94976 KB Output is correct
129 Correct 1319 ms 94948 KB Output is correct
130 Correct 1346 ms 94840 KB Output is correct
131 Correct 1380 ms 94840 KB Output is correct
132 Correct 1348 ms 94904 KB Output is correct
133 Correct 1337 ms 94968 KB Output is correct