oj.uz

Submission #1034262

# Submission time Handle Problem Language Result Execution time Memory
1034262 2024-07-25T11:24:05 Z juicy Election Campaign (JOI15_election_campaign) C++17
100 / 100
 172 ms 29520 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 1e5 + 5, LG = 17;

int n, m;
int pr[LG][N], s[N], dp[N], L[N], R[N], dep[N];
vector<int> g[N];
vector<array<int, 3>> cands[N];

void upd(int i, int x) {
	for (; i <= n; i += i & -i) {
		s[i] += x;
	}
}

void upd(int l, int r, int x) {
	upd(l, x);
	upd(r + 1, -x);
}

int qry(int i) {
	int res = 0;
	for (; i; i -= i & -i) {
		res += s[i];
	}
	return res;
}

int timer;

void pre_dfs(int u) {
	L[u] = ++timer;
	for (int v : g[u]) {
		if (v != pr[0][u]) {
			dep[v] = dep[u] + 1;
			pr[0][v] = u;
			for (int j = 1; j < LG; ++j) {
				pr[j][v] = pr[j - 1][pr[j - 1][v]];
			}
			pre_dfs(v);
		}
	}
	R[u] = timer;
}

int lca(int u, int v) {
	if (dep[u] < dep[v]) {
		swap(u, v);
	}
	for (int j = LG - 1; ~j; --j) {
		if (dep[u] - (1 << j) >= dep[v]) {
			u = pr[j][u];
		} 
	}
	if (u == v) {
		return u;
	} 
	for (int j = LG - 1; ~j; --j) {
		if (pr[j][u] != pr[j][v]) {
			u = pr[j][u], v = pr[j][v];
		}
	}
	return pr[0][u];
}

void dfs(int u) {
	int sum = 0;
	for (int v : g[u]) {
		if (v != pr[0][u]) {
			dfs(v);
			sum += dp[v];
		}
	}
	dp[u] = sum;
	for (auto [x, y, w] : cands[u]) {
		dp[u] = max(dp[u], qry(L[x]) + qry(L[y]) + w + sum);
	}
	upd(L[u], R[u], sum - dp[u]);
}

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	cin >> n;
	for (int i = 1; i < n; ++i) {
		int u, v; cin >> u >> v;
		g[u].push_back(v);
		g[v].push_back(u);
	}	
	pre_dfs(1);
	cin >> m;
	while (m--) {
		int u, v, w; cin >> u >> v >> w;
		cands[lca(u, v)].push_back({u, v, w});
	}
	dfs(1);
	cout << dp[1];
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5212 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 5212 KB Output is correct
5 Correct 41 ms 18004 KB Output is correct
6 Correct 31 ms 25756 KB Output is correct
7 Correct 47 ms 23120 KB Output is correct
8 Correct 34 ms 18516 KB Output is correct
9 Correct 46 ms 21588 KB Output is correct
10 Correct 36 ms 18524 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5160 KB Output is correct
2 Correct 2 ms 5464 KB Output is correct
3 Correct 2 ms 5468 KB Output is correct
4 Correct 76 ms 28948 KB Output is correct
5 Correct 92 ms 29080 KB Output is correct
6 Correct 73 ms 28956 KB Output is correct
7 Correct 77 ms 29164 KB Output is correct
8 Correct 81 ms 29008 KB Output is correct
9 Correct 68 ms 29012 KB Output is correct
10 Correct 77 ms 29008 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5160 KB Output is correct
2 Correct 2 ms 5464 KB Output is correct
3 Correct 2 ms 5468 KB Output is correct
4 Correct 76 ms 28948 KB Output is correct
5 Correct 92 ms 29080 KB Output is correct
6 Correct 73 ms 28956 KB Output is correct
7 Correct 77 ms 29164 KB Output is correct
8 Correct 81 ms 29008 KB Output is correct
9 Correct 68 ms 29012 KB Output is correct
10 Correct 77 ms 29008 KB Output is correct
11 Correct 8 ms 6232 KB Output is correct
12 Correct 104 ms 29268 KB Output is correct
13 Correct 80 ms 29264 KB Output is correct
14 Correct 65 ms 29276 KB Output is correct
15 Correct 84 ms 29264 KB Output is correct
16 Correct 69 ms 29272 KB Output is correct
17 Correct 78 ms 29344 KB Output is correct
18 Correct 78 ms 29268 KB Output is correct
19 Correct 65 ms 29432 KB Output is correct
20 Correct 90 ms 29520 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 20748 KB Output is correct
2 Correct 64 ms 29004 KB Output is correct
3 Correct 117 ms 25936 KB Output is correct
4 Correct 67 ms 21260 KB Output is correct
5 Correct 99 ms 25636 KB Output is correct
6 Correct 77 ms 21284 KB Output is correct
7 Correct 117 ms 25232 KB Output is correct
8 Correct 74 ms 21012 KB Output is correct
9 Correct 63 ms 28956 KB Output is correct
10 Correct 116 ms 24332 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5212 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 5212 KB Output is correct
5 Correct 41 ms 18004 KB Output is correct
6 Correct 31 ms 25756 KB Output is correct
7 Correct 47 ms 23120 KB Output is correct
8 Correct 34 ms 18516 KB Output is correct
9 Correct 46 ms 21588 KB Output is correct
10 Correct 36 ms 18524 KB Output is correct
11 Correct 3 ms 5208 KB Output is correct
12 Correct 2 ms 5468 KB Output is correct
13 Correct 3 ms 5468 KB Output is correct
14 Correct 3 ms 5212 KB Output is correct
15 Correct 2 ms 5212 KB Output is correct
16 Correct 3 ms 5212 KB Output is correct
17 Correct 3 ms 5212 KB Output is correct
18 Correct 3 ms 5468 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 3 ms 5468 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5212 KB Output is correct
2 Correct 2 ms 5164 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 5212 KB Output is correct
5 Correct 41 ms 18004 KB Output is correct
6 Correct 31 ms 25756 KB Output is correct
7 Correct 47 ms 23120 KB Output is correct
8 Correct 34 ms 18516 KB Output is correct
9 Correct 46 ms 21588 KB Output is correct
10 Correct 36 ms 18524 KB Output is correct
11 Correct 3 ms 5160 KB Output is correct
12 Correct 2 ms 5464 KB Output is correct
13 Correct 2 ms 5468 KB Output is correct
14 Correct 76 ms 28948 KB Output is correct
15 Correct 92 ms 29080 KB Output is correct
16 Correct 73 ms 28956 KB Output is correct
17 Correct 77 ms 29164 KB Output is correct
18 Correct 81 ms 29008 KB Output is correct
19 Correct 68 ms 29012 KB Output is correct
20 Correct 77 ms 29008 KB Output is correct
21 Correct 8 ms 6232 KB Output is correct
22 Correct 104 ms 29268 KB Output is correct
23 Correct 80 ms 29264 KB Output is correct
24 Correct 65 ms 29276 KB Output is correct
25 Correct 84 ms 29264 KB Output is correct
26 Correct 69 ms 29272 KB Output is correct
27 Correct 78 ms 29344 KB Output is correct
28 Correct 78 ms 29268 KB Output is correct
29 Correct 65 ms 29432 KB Output is correct
30 Correct 90 ms 29520 KB Output is correct
31 Correct 82 ms 20748 KB Output is correct
32 Correct 64 ms 29004 KB Output is correct
33 Correct 117 ms 25936 KB Output is correct
34 Correct 67 ms 21260 KB Output is correct
35 Correct 99 ms 25636 KB Output is correct
36 Correct 77 ms 21284 KB Output is correct
37 Correct 117 ms 25232 KB Output is correct
38 Correct 74 ms 21012 KB Output is correct
39 Correct 63 ms 28956 KB Output is correct
40 Correct 116 ms 24332 KB Output is correct
41 Correct 3 ms 5208 KB Output is correct
42 Correct 2 ms 5468 KB Output is correct
43 Correct 3 ms 5468 KB Output is correct
44 Correct 3 ms 5212 KB Output is correct
45 Correct 2 ms 5212 KB Output is correct
46 Correct 3 ms 5212 KB Output is correct
47 Correct 3 ms 5212 KB Output is correct
48 Correct 3 ms 5468 KB Output is correct
49 Correct 2 ms 5212 KB Output is correct
50 Correct 3 ms 5468 KB Output is correct
51 Correct 83 ms 21328 KB Output is correct
52 Correct 85 ms 29364 KB Output is correct
53 Correct 122 ms 24584 KB Output is correct
54 Correct 60 ms 21644 KB Output is correct
55 Correct 83 ms 21256 KB Output is correct
56 Correct 80 ms 29268 KB Output is correct
57 Correct 95 ms 25428 KB Output is correct
58 Correct 67 ms 21512 KB Output is correct
59 Correct 75 ms 21332 KB Output is correct
60 Correct 84 ms 29248 KB Output is correct
61 Correct 98 ms 25400 KB Output is correct
62 Correct 71 ms 21300 KB Output is correct
63 Correct 89 ms 21120 KB Output is correct
64 Correct 85 ms 29360 KB Output is correct
65 Correct 172 ms 25272 KB Output is correct
66 Correct 70 ms 21560 KB Output is correct
67 Correct 85 ms 21188 KB Output is correct
68 Correct 77 ms 29268 KB Output is correct
69 Correct 94 ms 24252 KB Output is correct
70 Correct 67 ms 21700 KB Output is correct