Submission #1173838

#	Time	Username	Problem	Language	Result	Execution time	Memory
1173838		AmirAli_H1	Board Game (JOI24_boardgame)	C++20	3 / 100	4094 ms	7236 KiB

Main

// In the name of Allah

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

typedef		long long int			ll;
typedef		long double				ld;
typedef		pair<int, int>			pii;
typedef		pair<ll, ll>			pll;
typedef		complex<ld>				cld;

#define		all(x)					(x).begin(),(x).end()
#define		len(x)					((ll) (x).size())
#define		F						first
#define		S						second
#define		pb						push_back
#define		sep						' '
#define		endl					'\n'
#define		Mp						make_pair
#define		kill(x)					cout << x << '\n', exit(0)
#define		set_dec(x)				cout << fixed << setprecision(x);
#define		file_io(x,y)			freopen(x, "r", stdin); freopen(y, "w", stdout);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 5e4 + 7;
const ll oo = 1e18 + 4;
const int sq = 5000 + 4;

int n, m, k, vx;
vector<int> adj[maxn];
string s; int M[maxn], Mx[maxn];
int Ax[maxn]; ll D1[maxn], D2[maxn];
ll dis[maxn], disx[maxn]; int mark[maxn];
queue<int> qu; vector<int> ls[maxn];
ll ans[maxn];

void pre_bfs() {
	while (!qu.empty()) {
		int v = qu.front(); qu.pop();
		for (int u : adj[v]) {
			if (dis[v] + 1 < dis[u]) {
				dis[u] = dis[v] + 1;
				qu.push(u);
			}
		}
	}
}

ll getx(ll T) {
	if (T == 0) return 0;
	ll res = 0;
	for (int i = 1; i < k; i++) {
		int v = Ax[i];
		res += min(D1[v] + (T - 1) * 2, D2[v] + (T - 1));
	}
	return res;
}

void cal_bfs(int v) {
	fill(dis, dis + n, oo); dis[v] = 0;
	for (int T = 0; T < sq; T++) {
		fill(mark, mark + n, 0);
		for (int i = 0; i < n; i++) disx[i] = dis[i];
		for (int v = 0; v < n; v++) {
			if (dis[v] != oo) ls[dis[v]].pb(v);
		}
		for (int d = 0; d < n; d++) {
			for (int v : ls[d]) {
				if (mark[v]) continue;
				mark[v] = 1;
				for (int u : adj[v]) {
					if (dis[v] + 1 < dis[u] && !M[u]) {
						dis[u] = dis[v] + 1;
						ls[dis[u]].pb(u);
					}
					disx[u] = min(disx[u], dis[v] + 1);
				}
			}
		}
		for (int i = 0; i < n; i++) dis[i] = disx[i];
		for (int d = 0; d < n; d++) ls[d].clear();
		ll Dx = getx(T);
		for (int i = 0; i < n; i++) ans[i] = min(ans[i], dis[i] + Dx);
	}
}

void solve() {
	cin >> n >> m >> k;
	for (int i = 0; i < m; i++) {
		int u, v;
		cin >> u >> v; u--; v--;
		adj[u].pb(v); adj[v].pb(u);
	}
	cin >> s;
	for (int i = 0; i < n; i++) M[i] = (s[i] == '1');
	for (int i = 0; i < n; i++) {
		Mx[i] = 0;
		if (!M[i]) continue;
		for (int j : adj[i]) {
			if (M[j]) {
				Mx[i] = 1;
				break;
			}
		}
	}
	for (int i = 0; i < k; i++) {
		cin >> Ax[i]; Ax[i]--;
	}
	vx = Ax[0];

	fill(dis, dis + n, oo);
	for (int i = 0; i < n; i++) {
		if (M[i]) {
			dis[i] = 0; qu.push(i);
		}
	}
	pre_bfs();
	for (int i = 0; i < n; i++) {
		D1[i] = oo;
		for (int j : adj[i]) D1[i] = min(D1[i], dis[j] + 1);
	}

	fill(dis, dis + n, oo);
	for (int i = 0; i < n; i++) {
		if (Mx[i]) {
			dis[i] = 0; qu.push(i);
		}
	}
	pre_bfs();
	for (int i = 0; i < n; i++) {
		D2[i] = oo;
		for (int j : adj[i]) D2[i] = min(D2[i], dis[j] + 1);
	}

	int t = 0;
	for (int i = 0; i < n; i++) t += M[i];
	if (t == 0) {
		fill(dis, dis + n, oo);
		dis[vx] = 0; qu.push(vx);
		pre_bfs();
		for (int i = 0; i < n; i++) cout << dis[i] << endl;
		return ;
	}

	fill(ans, ans + n, oo);
	cal_bfs(vx);
	for (int i = 0; i < n; i++) cout << ans[i] << endl;
}

int main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	
	int T = 1;
	while (T--) {
		solve();
	}
	
	return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 0 / 7
• Subtask 3: 0 / 7
• Subtask 4: 0 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 9
• Subtask 7: 0 / 23
• Subtask 8: 0 / 9