oj.uz

Submission #264184

# Submission time Handle Problem Language Result Execution time Memory
264184 2020-08-14T05:29:58 Z ruler Election Campaign (JOI15_election_campaign) C++14
100 / 100
 267 ms 32152 KB 
// IOI 2021
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define ends ' '
#define endt '\t'
#define die(x) return cout << x << endl, 0
#define all(v) v.begin(), v.end()
#define sz(x) (int)(x.size())
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) { cerr << ends << H; debug_out(T...); }
#define debug(...) cerr << "{" << #__VA_ARGS__ << "}:", debug_out(__VA_ARGS__)
typedef long long ll;
typedef pair<int, int> pii;
const int INF = 1e9;
const ll MOD = 1e9 + 7;

////////////////////////////////////////////////////////////////////
 
const int N = 1e5 + 5, LOG = 17;

int S[N], F[N], H[N], P[LOG][N], ts;
int DP[N][3],  FEN[N];
vector<int> G[N];
int A[N], B[N], C[N];
vector<int> Q[N];

void Add(int p, int x) { for (p++; p < N; p += p & -p) FEN[p] += x; }
int Get(int p) {
	int res = 0;
	for (p++; p > 0; p -= p & -p) res += FEN[p];
	return res;
}
void DFSH(int v, int p = 0) {
	S[v] = ts++, P[0][v] = p;
	for (int i = 1; i < LOG; i++) P[i][v] = P[i - 1][P[i - 1][v]];
	for (int u : G[v]) if (u != p) H[u] = H[v] + 1, DFSH(u, v);
	F[v] = ts;
}
int GetPar(int v, int h) {
	for (int i = 0; i < LOG; i++) if ((h >> i) & 1) v = P[i][v];
	return v;
}
int GetLCA(int v, int u) {
	if (H[v] < H[u]) swap(v, u);
	v = GetPar(v, H[v] - H[u]);
	if (v == u) return v;
	for (int i = LOG - 1; i >= 0; i--) if (P[i][v] != P[i][u])
		v = P[i][v], u = P[i][u];
	return P[0][v];
}
void DFS(int v, int p = 0) {
	for (int u : G[v]) if (u != p) {
		DFS(u, v);
		DP[v][0] += DP[u][2];
	}
	for (int u : G[v]) if (u != p) {
		Add(S[u], DP[v][0] - DP[u][2]);
		Add(F[u], DP[u][2] - DP[v][0]);
	}
	for (int q : Q[v]) {
		int a = A[q], b = B[q], c = C[q];
		DP[v][1] = max(DP[v][1], c + Get(S[a]) + Get(S[b]) + DP[a][0] + DP[b][0] - DP[v][0]);
	}
	DP[v][2] = max(DP[v][0], DP[v][1]);
}

int main() {
 
	ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	mt19937 Rnd(time(0));

	int n; cin >> n;
	for (int i = 1; i < n; i++) {
		int v, u; cin >> v >> u;
		G[v].push_back(u);
		G[u].push_back(v);
	}
	DFSH(1);
	int m; cin >> m;
	for (int i = 0; i < m; i++) {
		cin >> A[i] >> B[i] >> C[i];
		Q[GetLCA(A[i], B[i])].push_back(i);
	}
	DFS(1);
	cout << DP[1][2] << endl;

	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 123 ms 18912 KB Output is correct
6 Correct 62 ms 28152 KB Output is correct
7 Correct 127 ms 24900 KB Output is correct
8 Correct 97 ms 19192 KB Output is correct
9 Correct 117 ms 23032 KB Output is correct
10 Correct 92 ms 19224 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5376 KB Output is correct
4 Correct 128 ms 31608 KB Output is correct
5 Correct 128 ms 31736 KB Output is correct
6 Correct 124 ms 31764 KB Output is correct
7 Correct 152 ms 31736 KB Output is correct
8 Correct 117 ms 31672 KB Output is correct
9 Correct 114 ms 31736 KB Output is correct
10 Correct 132 ms 31656 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5376 KB Output is correct
4 Correct 128 ms 31608 KB Output is correct
5 Correct 128 ms 31736 KB Output is correct
6 Correct 124 ms 31764 KB Output is correct
7 Correct 152 ms 31736 KB Output is correct
8 Correct 117 ms 31672 KB Output is correct
9 Correct 114 ms 31736 KB Output is correct
10 Correct 132 ms 31656 KB Output is correct
11 Correct 15 ms 6144 KB Output is correct
12 Correct 120 ms 32016 KB Output is correct
13 Correct 121 ms 32052 KB Output is correct
14 Correct 115 ms 31992 KB Output is correct
15 Correct 122 ms 32016 KB Output is correct
16 Correct 127 ms 32040 KB Output is correct
17 Correct 139 ms 31992 KB Output is correct
18 Correct 118 ms 31992 KB Output is correct
19 Correct 107 ms 31992 KB Output is correct
20 Correct 117 ms 31992 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 173 ms 21876 KB Output is correct
2 Correct 103 ms 31736 KB Output is correct
3 Correct 243 ms 28024 KB Output is correct
4 Correct 125 ms 22132 KB Output is correct
5 Correct 203 ms 27604 KB Output is correct
6 Correct 122 ms 22392 KB Output is correct
7 Correct 241 ms 27220 KB Output is correct
8 Correct 185 ms 22384 KB Output is correct
9 Correct 109 ms 31680 KB Output is correct
10 Correct 232 ms 26088 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 123 ms 18912 KB Output is correct
6 Correct 62 ms 28152 KB Output is correct
7 Correct 127 ms 24900 KB Output is correct
8 Correct 97 ms 19192 KB Output is correct
9 Correct 117 ms 23032 KB Output is correct
10 Correct 92 ms 19224 KB Output is correct
11 Correct 4 ms 5376 KB Output is correct
12 Correct 4 ms 5376 KB Output is correct
13 Correct 4 ms 5376 KB Output is correct
14 Correct 5 ms 5376 KB Output is correct
15 Correct 5 ms 5376 KB Output is correct
16 Correct 5 ms 5376 KB Output is correct
17 Correct 4 ms 5376 KB Output is correct
18 Correct 6 ms 5376 KB Output is correct
19 Correct 5 ms 5376 KB Output is correct
20 Correct 5 ms 5504 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 5 ms 5248 KB Output is correct
5 Correct 123 ms 18912 KB Output is correct
6 Correct 62 ms 28152 KB Output is correct
7 Correct 127 ms 24900 KB Output is correct
8 Correct 97 ms 19192 KB Output is correct
9 Correct 117 ms 23032 KB Output is correct
10 Correct 92 ms 19224 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 4 ms 5120 KB Output is correct
13 Correct 4 ms 5376 KB Output is correct
14 Correct 128 ms 31608 KB Output is correct
15 Correct 128 ms 31736 KB Output is correct
16 Correct 124 ms 31764 KB Output is correct
17 Correct 152 ms 31736 KB Output is correct
18 Correct 117 ms 31672 KB Output is correct
19 Correct 114 ms 31736 KB Output is correct
20 Correct 132 ms 31656 KB Output is correct
21 Correct 15 ms 6144 KB Output is correct
22 Correct 120 ms 32016 KB Output is correct
23 Correct 121 ms 32052 KB Output is correct
24 Correct 115 ms 31992 KB Output is correct
25 Correct 122 ms 32016 KB Output is correct
26 Correct 127 ms 32040 KB Output is correct
27 Correct 139 ms 31992 KB Output is correct
28 Correct 118 ms 31992 KB Output is correct
29 Correct 107 ms 31992 KB Output is correct
30 Correct 117 ms 31992 KB Output is correct
31 Correct 173 ms 21876 KB Output is correct
32 Correct 103 ms 31736 KB Output is correct
33 Correct 243 ms 28024 KB Output is correct
34 Correct 125 ms 22132 KB Output is correct
35 Correct 203 ms 27604 KB Output is correct
36 Correct 122 ms 22392 KB Output is correct
37 Correct 241 ms 27220 KB Output is correct
38 Correct 185 ms 22384 KB Output is correct
39 Correct 109 ms 31680 KB Output is correct
40 Correct 232 ms 26088 KB Output is correct
41 Correct 4 ms 5376 KB Output is correct
42 Correct 4 ms 5376 KB Output is correct
43 Correct 4 ms 5376 KB Output is correct
44 Correct 5 ms 5376 KB Output is correct
45 Correct 5 ms 5376 KB Output is correct
46 Correct 5 ms 5376 KB Output is correct
47 Correct 4 ms 5376 KB Output is correct
48 Correct 6 ms 5376 KB Output is correct
49 Correct 5 ms 5376 KB Output is correct
50 Correct 5 ms 5504 KB Output is correct
51 Correct 208 ms 22704 KB Output is correct
52 Correct 166 ms 31992 KB Output is correct
53 Correct 267 ms 26612 KB Output is correct
54 Correct 140 ms 22520 KB Output is correct
55 Correct 224 ms 22260 KB Output is correct
56 Correct 160 ms 32152 KB Output is correct
57 Correct 228 ms 27256 KB Output is correct
58 Correct 132 ms 22520 KB Output is correct
59 Correct 196 ms 22520 KB Output is correct
60 Correct 116 ms 31992 KB Output is correct
61 Correct 212 ms 27408 KB Output is correct
62 Correct 128 ms 22444 KB Output is correct
63 Correct 188 ms 22264 KB Output is correct
64 Correct 118 ms 31992 KB Output is correct
65 Correct 261 ms 27252 KB Output is correct
66 Correct 138 ms 22648 KB Output is correct
67 Correct 221 ms 22264 KB Output is correct
68 Correct 135 ms 31992 KB Output is correct
69 Correct 200 ms 25976 KB Output is correct
70 Correct 130 ms 22648 KB Output is correct