Submission #705372

#	Time	Username	Problem	Language	Result	Execution time	Memory
705372		NeroZein	Džumbus (COCI19_dzumbus)	C++17	50 / 110	191 ms	25052 KiB

dzumbus

#include <bits/stdc++.h>
#define int long long
#define prev pre
using namespace std;
 
const int N = 1003;
 
int n;
int a[N];
bool vis[N];
vector<int> g[N];
 
int sz[N];
int dp[N][N][3];
int prev[N][3];
 
inline void relax (int& x, int y) {
	x = min(x, y);
}
 
void dfs (int v, int p = 0) {//node, taken people, take my self
	dp[v][0][0] = 0;
	dp[v][0][1] = a[v];
	sz[v] = 1;
	vis[v] = true;
	for (int u : g[v]) {
		if (!vis[u]) {
			dfs(u, v);
		}
	}
	for (int i = 0; i <= n; ++i) {
		dp[v][i][0] = dp[v][i][1] = dp[v][i][2] = 1e9;
	}
	dp[v][0][0] = 0;
	dp[v][0][1] = a[v];
	for (int u : g[v]) {
		if (u == p) {
			continue;
		}
		for (int i = 0; i <= n; ++i) {
			prev[i][0] = dp[v][i][0];
			prev[i][1] = dp[v][i][1];
			prev[i][2] = dp[v][i][2];
		}
		for (int i = 0; i <= sz[v]; ++i) {
			for (int j = 0; j <= sz[u]; ++j) {
				relax(dp[v][i + j][0], min({dp[u][j][1], dp[u][j][0], dp[u][j][2]}) + prev[i][0]);
				relax(dp[v][i + j][1], min(prev[i][0] + a[v], prev[i][1]) + dp[u][j][0]);
				relax(dp[v][i + j][2], prev[i][2] + min({dp[u][j][2], dp[u][j][0]}));
				relax(dp[v][i + j + 1][2], prev[i][2] + dp[u][j][1]);
				relax(dp[v][i + j + 1][2], min(prev[i][0] + a[v], prev[i][1]) + dp[u][j][2]);
				relax(dp[v][i + j + 2][2], min(prev[i][0] + a[v], prev[i][1]) + dp[u][j][1]);
			}
		}
		sz[v] += sz[u];
	}
}
 
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
	int m;
	cin >> n >> m;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	for (int i = 0; i < m; ++i) {
		int u, v;
		cin >> u >> v;
		g[u].push_back(v); 
		g[v].push_back(u); 
	}
	for (int i = 1; i <= n; ++i) {
		if (!vis[i]) {
			dfs(i);
		}
	}
	int q;
	cin >> q;
	while (q--) {
		int s;
		cin >> s;
		for (int i = n; i >= 0; --i) {
			if (dp[1][i][0] <= s || dp[1][i][1] <= s || dp[1][i][2] <= s) {
				cout << i << '\n';
				break;
			}
		}
	}
  return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30