oj.uz

Submission #618879

# Submission time Handle Problem Language Result Execution time Memory
618879 2022-08-02T08:09:27 Z Drew_ Dynamic Diameter (CEOI19_diameter) C++17
24 / 100
 5000 ms 4288 KB 
#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define f1 first
#define s2 second

using ii = pair<int, int>;
using ll = long long;

const int MAX = 5069;

int N, Q, W;
int len[MAX];
vector<ii> adj[MAX];

ll depth[MAX];

inline ll getdia()
{
	const auto dfs = [&](const auto &self, int node, int par) -> void
	{	
		for (auto [to, id] : adj[node]) if (to != par)
		{
			depth[to] = depth[node] + len[id];
			self(self, to, node);
		}
	};
	depth[1] = 0;
	dfs(dfs, 1, -1);

	int best = 1;
	for (int i = 2; i <= N; ++i)
		if (depth[best] < depth[i])
			best = i;

	depth[best] = 0;
	dfs(dfs, best, -1);
	return *max_element(depth+1, depth+N+1);
}

int main()
{
	ios :: sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	cin >> N >> Q >> W;
	for (int i = 0, u, v; i < N-1; ++i)
	{
		cin >> u >> v >> len[i];
		adj[u].pb({v, i});
		adj[v].pb({u, i});
	}

	for (int prv = 0, i, x; Q--;)
	{
		cin >> i >> x;
		(i += prv) %= (N-1);
		(x += prv) %= W;

		// cerr << i << " and " << x << '\n';

		len[i] = x;
		cout << (prv = getdia()) << '\n';
	}

	return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 340 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 208 ms 616 KB Output is correct
20 Correct 174 ms 512 KB Output is correct
21 Correct 169 ms 508 KB Output is correct
22 Correct 174 ms 520 KB Output is correct
23 Correct 1262 ms 820 KB Output is correct
24 Correct 1345 ms 696 KB Output is correct
25 Correct 1279 ms 840 KB Output is correct
26 Correct 1430 ms 844 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 11 ms 468 KB Output is correct
5 Correct 54 ms 780 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 3 ms 468 KB Output is correct
9 Correct 22 ms 484 KB Output is correct
10 Correct 248 ms 612 KB Output is correct
11 Correct 914 ms 980 KB Output is correct
12 Correct 6 ms 596 KB Output is correct
13 Correct 33 ms 596 KB Output is correct
14 Correct 167 ms 700 KB Output is correct
15 Correct 1791 ms 872 KB Output is correct
16 Execution timed out 5086 ms 996 KB Time limit exceeded
17 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 468 KB Output is correct
2 Correct 171 ms 520 KB Output is correct
3 Correct 860 ms 840 KB Output is correct
4 Correct 1879 ms 1132 KB Output is correct
5 Runtime error 3 ms 1108 KB Execution killed with signal 11
6 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Runtime error 11 ms 4288 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 208 ms 616 KB Output is correct
20 Correct 174 ms 512 KB Output is correct
21 Correct 169 ms 508 KB Output is correct
22 Correct 174 ms 520 KB Output is correct
23 Correct 1262 ms 820 KB Output is correct
24 Correct 1345 ms 696 KB Output is correct
25 Correct 1279 ms 840 KB Output is correct
26 Correct 1430 ms 844 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 3 ms 340 KB Output is correct
30 Correct 11 ms 468 KB Output is correct
31 Correct 54 ms 780 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 1 ms 468 KB Output is correct
34 Correct 3 ms 468 KB Output is correct
35 Correct 22 ms 484 KB Output is correct
36 Correct 248 ms 612 KB Output is correct
37 Correct 914 ms 980 KB Output is correct
38 Correct 6 ms 596 KB Output is correct
39 Correct 33 ms 596 KB Output is correct
40 Correct 167 ms 700 KB Output is correct
41 Correct 1791 ms 872 KB Output is correct
42 Execution timed out 5086 ms 996 KB Time limit exceeded
43 Halted 0 ms 0 KB -