Submission #951535

#	Time	Username	Problem	Language	Result	Execution time	Memory
951535		BF001	Burza (COCI16_burza)	C++17	0 / 160	1 ms	512 KiB

burza

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define N 405

int n, k, rt[N];
vector<int> adj[N];
vector<int> pre[N], suf[N];

int get(int u, int p){
	if (rt[u] != -1) return rt[u];
	int pos = 0;
	int r = 1e18;
	if (adj[u].size() == 1 && p != 0) r = 1;
	if (adj[u].size() == 0) r = 1;
	pre[u][0] = 1;
	for (auto x : adj[u]){
		if (x == p) continue;
		pos++;
		pre[u][pos] = max(pre[u][pos - 1], get(x, u) + 1);
	}
	pos++;
	suf[u][pos] = 1;
	for (int i = adj[u].size() - 1; i >= 0; i--){
		int x = adj[u][i];
		if (x == p) continue;
		pos--;
		suf[u][pos] = max(suf[u][pos + 1], get(x, u) + 1);
	}
	pos = 0;
	for (auto x : adj[u]){
		if (x == p) continue;
		pos++;
		int du = max(pre[u][pos - 1], suf[u][pos + 1]);
		r = min(r, du);
	}
	return rt[u] = r;
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
        
    memset(rt, -1, sizeof(rt));

	cin >> n >> k;
	for (int i = 1; i <= n - 1; i++){
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}    

	for (int i = 0; i <= n; i++) {
		pre[i].resize(adj[i].size() + 2, 0);
		suf[i].resize(adj[i].size() + 2, 0);
	}

	if (get(1, 0) <= k){
		cout << "DA";
	}
	else cout << "NE";

    return 0;
}     

• Subtask 1: 0 / 16
• Subtask 2: 0 / 16
• Subtask 3: 0 / 16
• Subtask 4: 0 / 16
• Subtask 5: 0 / 16
• Subtask 6: 0 / 16
• Subtask 7: 0 / 16
• Subtask 8: 0 / 16
• Subtask 9: 0 / 16
• Subtask 10: 0 / 16