Submission #396064

#	Time	Username	Problem	Language	Result	Execution time	Memory
396064		ronnith	Džumbus (COCI19_dzumbus)	C++14	0 / 110	42 ms	7116 KiB

dzumbus

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

inline void remin(ll& x, ll y) { x = (y < x ? y : x); }

const int N = (int)1e3 + 1, Q = (int)2e5;
int n, m, q, d[N];
bool vis[N];
vector<ll> dp0[N];
vector<ll> dp1[N][2];
vector<int> adj[N];

void dfs(int x, int pr) {
	vis[x] = true;
	for(auto& e : adj[x]) {
		if(e != pr) {
			dfs(e, x);
		}
	}
}

void dfs2(int x, int pr) {
	dp0[x] = {0, LLONG_MAX};
	dp1[x][0] = {d[x], LLONG_MAX};
	dp1[x][1] = {LLONG_MAX, LLONG_MAX};
	for(auto& e : adj[x]) {
		if(e != pr) {
			dfs2(e, x);
			int a = (int)dp0[x].size(), b = (int)dp0[e].size();
			vector<ll> res(a + b - 1, LLONG_MAX);
			for(int i = 0;i < a;i ++) {
				for(int j = 0;j < b;j ++) {
					if(dp1[x][0][i] != LLONG_MAX) {
						if(dp1[e][0][j] != LLONG_MAX)
							remin(res[i + j + 2], dp1[x][0][i] + dp1[e][0][j]);
						if(dp1[e][1][j] != LLONG_MAX)
							remin(res[i + j + 1], dp1[x][0][i] + dp1[e][1][j]);
					}
					if(dp1[x][1][i] != LLONG_MAX) {
						if(dp1[e][0][j] != LLONG_MAX)
							remin(res[i + j + 1], dp1[x][1][i] + dp1[e][0][j]);
						if(dp1[e][1][j] != LLONG_MAX)
							remin(res[i + j], dp1[x][1][i] + dp1[e][1][j]);
						if(dp0[e][j] != LLONG_MAX)
							remin(res[i + j], dp1[x][1][i] + dp0[e][j]);
					}
				}
			}
			dp1[x][1] = res;
			res = vector<ll>(a + b - 1, LLONG_MAX);
			for(int i = 0;i < a;i ++) {
				for(int j = 0;j < b;j ++) {
					if(dp1[x][0][i] != LLONG_MAX) {
						if(dp0[e][j] != LLONG_MAX)
							remin(res[i + j], dp1[x][0][i] + dp0[e][j]);
					}
				}
			}
			dp1[x][0] = res;
			res = vector<ll>(a + b - 1, LLONG_MAX);
			for(int i = 0;i < a;i ++) {
				for(int j = 0;j < b;j ++) {
					if(dp0[x][i] != LLONG_MAX) {
						if(dp1[e][1][j] != LLONG_MAX)
							remin(res[i + j], dp0[x][i] + dp1[e][1][j]);
						if(dp1[e][0][j] != LLONG_MAX)
							remin(res[i + j], dp0[x][i] + dp1[e][0][j]);
						if(dp0[e][j] != LLONG_MAX)
							remin(res[i + j], dp0[x][i] + dp0[e][j]);
					}
				}
			}
			dp0[x] = res;
		}
	}
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cin >> n >> m;
	d[0] = 0;
	for(int i = 1;i <= n;i ++) {
		cin >> d[i];
	}
	for(int i = 0;i < m;i ++) {
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	for(int i = 1;i <= n;i ++) {
		if(!vis[i]) {
			dfs(i, -1);
			adj[0].push_back(i);
			adj[i].push_back(0);
		}
	}
	dfs2(0, -1);
	cin >> q;
	while(q --) {
		int s;
		cin >> s;
		int lx = 0, rx = n;
		while(lx < rx) {
			int g = lx + (rx - lx + 1) / 2;
			if(dp0[0][g] <= s) {
				lx = g;
			} else {
				rx = g - 1;
			}
		}
		cout << lx << '\n';
	}
	return 0;
}

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