oj.uz

답안 #906268

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
906268 2024-01-13T22:19:00 Z OAleksa Election Campaign (JOI15_election_campaign) C++14
100 / 100
 297 ms 44540 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define f first
#define s second
const int N = 1e5 + 69;
const int K = 17;
int up[N][K];
int n, m, st[4 * N], id[N], sz[N], dep[N], top[N];
int dp[N];
vector<int> g[N];
vector<tuple<int, int, int>> q[N];
int tin[N], tout[N], timer;
int anc(int a, int b) {
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}
int Lca(int a, int b) {
	if (anc(a, b))
		return a;
	else if (anc(b, a))
		return b;
	for (int i = K - 1;i >= 0;i--) {
		if (!anc(up[a][i], b) && up[a][i] > 0)
			a = up[a][i];
	}
	return up[a][0];
}
void dfs(int v, int p) {
	up[v][0] = p;
	tin[v] = ++timer;
	dep[v] = dep[p] + 1;
	sz[v] = 1;
	for (int i = 1;i < K;i++)
		up[v][i] = up[up[v][i - 1]][i - 1];
	for (auto u : g[v]) {
		if (u == p)
			continue;
		dfs(u, v);
		sz[v] += sz[u];
	}
	tout[v] = timer;
}
int x;
void hld(int v, int p, int c) {
	top[v] = c;
	id[v] = ++x;
	int mx = 0, s = -1;
	for (auto u : g[v]) {
		if (u == p)
			continue;
		if (sz[u] > mx) {
			mx = sz[u];
			s = u;
		}
	}
	if (s == -1)
		return;
	hld(s, v, c);
	for (auto u : g[v]) {
		if (u == p || u == s)
			continue;
		hld(u, v, u);
	}
}
void modify(int v, int tl, int tr, int p, int x) {
	if (tl == tr)
		st[v] = x;
	else {
		int mid = (tl + tr) / 2;
		if (p <= mid)
			modify(v * 2, tl, mid, p, x);
		else
			modify(v * 2 + 1, mid + 1, tr, p, x);
		st[v] = st[v * 2] + st[v * 2 + 1];
	}
}
int Get(int v, int tl, int tr, int l, int r) {
	if (tl > r || tr < l)
		return 0;
	else if (tl >= l && tr <= r)
		return st[v];
	else {
		int mid = (tl + tr) / 2;
		return Get(v * 2, tl, mid, l, r) + Get(v * 2 + 1, mid + 1, tr, l, r);
	}
}
int Get(int x, int y) {
	int res = 0;
	while (top[x] != top[y]) {
		res += Get(1, 1, n, id[top[x]], id[x]);
		x = up[top[x]][0];
	}
	res += Get(1, 1, n, id[y], id[x]);
	return res;
}
void solve(int v, int p) {
	int s = 0;
	for (auto u : g[v]) {
		if (u == p)
			continue;
		solve(u, v);
		s += dp[u];
	}
	dp[v] = s;
	for (auto u : q[v]) {
		int a, b, c;
		tie(a, b, c) = u;
		dp[v] = max(dp[v], s + Get(a, v) + Get(b, v) + c);
	}
	modify(1, 1, n, id[v], s - dp[v]);
}
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
  	cin >> n;
		for (int i = 1;i <= n - 1;i++) {
		 	int a, b;
		 	cin >> a >> b;
		 	g[a].push_back(b);
		 	g[b].push_back(a);
		}
		dfs(1, 0);
		hld(1, 0, 1);
		cin >> m;
		for (int i = 1;i <= m;i++) {
			int a, b, c;
			cin >> a >> b >> c;
			int lca = Lca(a, b);
			q[lca].push_back({a, b, c});
		}
		solve(1, 0);
		cout << dp[1] << '\n';
	}
  return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10672 KB Output is correct
4 Correct 3 ms 10588 KB Output is correct
5 Correct 98 ms 31940 KB Output is correct
6 Correct 47 ms 38996 KB Output is correct
7 Correct 98 ms 36692 KB Output is correct
8 Correct 101 ms 32284 KB Output is correct
9 Correct 96 ms 35140 KB Output is correct
10 Correct 69 ms 32084 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10588 KB Output is correct
2 Correct 3 ms 10588 KB Output is correct
3 Correct 3 ms 10844 KB Output is correct
4 Correct 107 ms 43784 KB Output is correct
5 Correct 106 ms 43860 KB Output is correct
6 Correct 95 ms 43860 KB Output is correct
7 Correct 115 ms 44176 KB Output is correct
8 Correct 112 ms 43860 KB Output is correct
9 Correct 99 ms 44064 KB Output is correct
10 Correct 108 ms 43860 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10588 KB Output is correct
2 Correct 3 ms 10588 KB Output is correct
3 Correct 3 ms 10844 KB Output is correct
4 Correct 107 ms 43784 KB Output is correct
5 Correct 106 ms 43860 KB Output is correct
6 Correct 95 ms 43860 KB Output is correct
7 Correct 115 ms 44176 KB Output is correct
8 Correct 112 ms 43860 KB Output is correct
9 Correct 99 ms 44064 KB Output is correct
10 Correct 108 ms 43860 KB Output is correct
11 Correct 16 ms 12124 KB Output is correct
12 Correct 108 ms 44292 KB Output is correct
13 Correct 110 ms 44296 KB Output is correct
14 Correct 100 ms 44224 KB Output is correct
15 Correct 115 ms 44540 KB Output is correct
16 Correct 98 ms 44116 KB Output is correct
17 Correct 106 ms 44124 KB Output is correct
18 Correct 106 ms 44300 KB Output is correct
19 Correct 106 ms 44164 KB Output is correct
20 Correct 108 ms 44116 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 278 ms 36364 KB Output is correct
2 Correct 112 ms 44116 KB Output is correct
3 Correct 215 ms 41236 KB Output is correct
4 Correct 180 ms 36788 KB Output is correct
5 Correct 199 ms 40668 KB Output is correct
6 Correct 170 ms 36544 KB Output is correct
7 Correct 220 ms 40176 KB Output is correct
8 Correct 212 ms 36460 KB Output is correct
9 Correct 95 ms 43860 KB Output is correct
10 Correct 215 ms 39236 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10672 KB Output is correct
4 Correct 3 ms 10588 KB Output is correct
5 Correct 98 ms 31940 KB Output is correct
6 Correct 47 ms 38996 KB Output is correct
7 Correct 98 ms 36692 KB Output is correct
8 Correct 101 ms 32284 KB Output is correct
9 Correct 96 ms 35140 KB Output is correct
10 Correct 69 ms 32084 KB Output is correct
11 Correct 4 ms 10844 KB Output is correct
12 Correct 4 ms 10844 KB Output is correct
13 Correct 4 ms 10844 KB Output is correct
14 Correct 4 ms 10844 KB Output is correct
15 Correct 4 ms 10844 KB Output is correct
16 Correct 4 ms 10844 KB Output is correct
17 Correct 4 ms 10844 KB Output is correct
18 Correct 3 ms 10844 KB Output is correct
19 Correct 4 ms 10844 KB Output is correct
20 Correct 3 ms 10844 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 10588 KB Output is correct
2 Correct 2 ms 10588 KB Output is correct
3 Correct 2 ms 10672 KB Output is correct
4 Correct 3 ms 10588 KB Output is correct
5 Correct 98 ms 31940 KB Output is correct
6 Correct 47 ms 38996 KB Output is correct
7 Correct 98 ms 36692 KB Output is correct
8 Correct 101 ms 32284 KB Output is correct
9 Correct 96 ms 35140 KB Output is correct
10 Correct 69 ms 32084 KB Output is correct
11 Correct 3 ms 10588 KB Output is correct
12 Correct 3 ms 10588 KB Output is correct
13 Correct 3 ms 10844 KB Output is correct
14 Correct 107 ms 43784 KB Output is correct
15 Correct 106 ms 43860 KB Output is correct
16 Correct 95 ms 43860 KB Output is correct
17 Correct 115 ms 44176 KB Output is correct
18 Correct 112 ms 43860 KB Output is correct
19 Correct 99 ms 44064 KB Output is correct
20 Correct 108 ms 43860 KB Output is correct
21 Correct 16 ms 12124 KB Output is correct
22 Correct 108 ms 44292 KB Output is correct
23 Correct 110 ms 44296 KB Output is correct
24 Correct 100 ms 44224 KB Output is correct
25 Correct 115 ms 44540 KB Output is correct
26 Correct 98 ms 44116 KB Output is correct
27 Correct 106 ms 44124 KB Output is correct
28 Correct 106 ms 44300 KB Output is correct
29 Correct 106 ms 44164 KB Output is correct
30 Correct 108 ms 44116 KB Output is correct
31 Correct 278 ms 36364 KB Output is correct
32 Correct 112 ms 44116 KB Output is correct
33 Correct 215 ms 41236 KB Output is correct
34 Correct 180 ms 36788 KB Output is correct
35 Correct 199 ms 40668 KB Output is correct
36 Correct 170 ms 36544 KB Output is correct
37 Correct 220 ms 40176 KB Output is correct
38 Correct 212 ms 36460 KB Output is correct
39 Correct 95 ms 43860 KB Output is correct
40 Correct 215 ms 39236 KB Output is correct
41 Correct 4 ms 10844 KB Output is correct
42 Correct 4 ms 10844 KB Output is correct
43 Correct 4 ms 10844 KB Output is correct
44 Correct 4 ms 10844 KB Output is correct
45 Correct 4 ms 10844 KB Output is correct
46 Correct 4 ms 10844 KB Output is correct
47 Correct 4 ms 10844 KB Output is correct
48 Correct 3 ms 10844 KB Output is correct
49 Correct 4 ms 10844 KB Output is correct
50 Correct 3 ms 10844 KB Output is correct
51 Correct 229 ms 36584 KB Output is correct
52 Correct 108 ms 44228 KB Output is correct
53 Correct 208 ms 39560 KB Output is correct
54 Correct 165 ms 36860 KB Output is correct
55 Correct 286 ms 36452 KB Output is correct
56 Correct 113 ms 44200 KB Output is correct
57 Correct 192 ms 40500 KB Output is correct
58 Correct 177 ms 36616 KB Output is correct
59 Correct 209 ms 36644 KB Output is correct
60 Correct 107 ms 44080 KB Output is correct
61 Correct 172 ms 40592 KB Output is correct
62 Correct 191 ms 36648 KB Output is correct
63 Correct 289 ms 36204 KB Output is correct
64 Correct 106 ms 44116 KB Output is correct
65 Correct 218 ms 40196 KB Output is correct
66 Correct 170 ms 36652 KB Output is correct
67 Correct 297 ms 36288 KB Output is correct
68 Correct 106 ms 44168 KB Output is correct
69 Correct 185 ms 39312 KB Output is correct
70 Correct 177 ms 36816 KB Output is correct