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답안 #955339

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
955339 2024-03-30T07:17:23 Z TAhmed33 Džumbus (COCI19_dzumbus) C++
110 / 110
 170 ms 19196 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll inf = 1e14;
const int MAXN = 1e3 + 25;
int n, m;
vector <int> adj[MAXN];
ll d[MAXN], sze[MAXN];
bool vis[MAXN];
void pre (int pos, int par) {
	vis[pos] = 1; sze[pos] = 1;
	for (int j = 0; j < (int)adj[pos].size(); j++) {
		if (adj[pos][j] == par) {
			adj[pos].erase(adj[pos].begin() + j);
		}
	}
	for (auto j : adj[pos]) {
		pre(j, pos); sze[pos] += sze[j];
	}
}
vector <ll> dp[MAXN][2][2];
vector <ll> convolve (vector <ll> a, vector <ll> b) {
	vector <ll> ret((int)a.size() + (int)b.size() - 1);
	for (auto &i : ret) i = inf;
	for (int i = 0; i < (int)a.size(); i++) {
		for (int j = 0; j < (int)b.size(); j++) {
			ret[i + j] = min(ret[i + j], a[i] + b[j]);
		}
	}
	return ret;
}
vector <ll> minimize (vector <ll> a, vector <ll> b) {
	vector <ll> ret(max((int)a.size(), (int)b.size()));
	for (auto &i : ret) i = inf;
	for (int i = 0; i < (int)a.size(); i++) ret[i] = min(ret[i], a[i]);
	for (int i = 0; i < (int)b.size(); i++) ret[i] = min(ret[i], b[i]);
	return ret;
}
vector <ll> shift (vector <ll> a) {
	a.insert(a.begin(), inf);
	return a;
}
vector <ll> add (vector <ll> a, ll x) {
	for (auto &i : a) i += x;
	return a;
}
void dfs (int pos) {
	for (auto j : adj[pos]) dfs(j);
	{ //!b
		dp[pos][0][0] = {0};
		for (auto j : adj[pos]) {
			auto g = minimize(dp[j][0][0], dp[j][0][1]);
			dp[pos][0][0] = convolve(dp[pos][0][0], g);
		}
		dp[pos][1][0] = dp[pos][0][0];
	}
	{ //!a and b
		vector <ll> dp2[2];
		dp2[0] = {0}; dp2[1] = {inf};
		for (auto j : adj[pos]) {
			auto g = dp2[0], h = dp2[1];
			dp2[0] = convolve(dp2[0], dp[j][1][0]);
			dp2[1] = convolve(g, dp[j][1][1]);
			dp2[1] = minimize(dp2[1], convolve(h, minimize(dp[j][1][1], dp[j][1][0])));
		}
		dp[pos][0][1] = minimize(dp2[0], shift(dp2[1]));
		dp[pos][0][1] = add(dp[pos][0][1], d[pos]);
	}
	{ //a and b
		dp[pos][1][1] = {0};
		for (auto j : adj[pos]) {
			auto g = minimize(dp[j][1][1], dp[j][1][0]);
			dp[pos][1][1] = convolve(dp[pos][1][1], g);
		}
		dp[pos][1][1] = add(shift(dp[pos][1][1]), d[pos]);
	}
}
int main () {
	//memset(dp, -1, sizeof(dp));
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; i++) cin >> d[i];
	for (int i = 1; i <= m; i++) {
		int a, b; cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}
	for (int i = 1; i <= n; i++) {
		if (!vis[i]) {
			adj[0].push_back(i); pre(i, -1); sze[0] += sze[i];
		} 
	}
	d[0] = inf; sze[0]++;
	dfs(0);	
	int q; cin >> q;
	while (q--) {
		ll x; cin >> x;
		ll ret = 0;
		for (int i = 1; i <= n; i++) {
			if (dp[0][0][0][i] <= x) ret = i;
		}
		cout << ret << '\n';
	}
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 12636 KB Output is correct
2 Correct 18 ms 16216 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 12636 KB Output is correct
2 Correct 18 ms 16216 KB Output is correct
3 Correct 167 ms 19196 KB Output is correct
4 Correct 170 ms 16116 KB Output is correct
5 Correct 165 ms 14420 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 1368 KB Output is correct
2 Correct 40 ms 1108 KB Output is correct
3 Correct 46 ms 1112 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 12636 KB Output is correct
2 Correct 18 ms 16216 KB Output is correct
3 Correct 167 ms 19196 KB Output is correct
4 Correct 170 ms 16116 KB Output is correct
5 Correct 165 ms 14420 KB Output is correct
6 Correct 41 ms 1368 KB Output is correct
7 Correct 40 ms 1108 KB Output is correct
8 Correct 46 ms 1112 KB Output is correct
9 Correct 152 ms 3664 KB Output is correct
10 Correct 156 ms 3780 KB Output is correct
11 Correct 161 ms 3208 KB Output is correct