Submission #877762

#	Time	Username	Problem	Language	Result	Execution time	Memory
877762		ZeroCool	Stranded Far From Home (BOI22_island)	C++17	0 / 100	526 ms	45444 KiB

island

#include <bits/stdc++.h>

using namespace std;

#define int long long

#define pb push_back
#define mp make_pair
#define mt make_tuple
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()

using ll = long long;
using ld = long double;
 
void solve(int T);
void pre();
 
const int N = 2e5 + 10;
const int M = 405;
const int SQRT = 500;
const int LOG = 20;
const int INF = 1e18;
const int MOD = 1e9+7;
const ld EPS = 1e-9;

void pre(){
	#ifdef ONLINE_JUDGE
    ios::sync_with_stdio(false);
    cin.tie(0);
	#endif
	
}

int32_t main(){
	pre();
	int tt = 1;
	//cin>>tt;
	for(int i = 1;i<=tt;i++){
		//cerr<<"Case "<<i<<": "<<endl;
		solve(i);
	}
    return 0;
}

int A[N];
vector<int> g[N];

bool vis[N];
int sum = 0;
vector<int> cur;

int xx;

void dfs(int x){
	vis[x] = true;
	sum += A[x];
	cur.pb(x);
	for(auto p: g[x]){
		if(vis[p])continue;
		if(A[p] <= xx)dfs(p);
	}
}

void solve(int T){
    int n,m;
	cin>>n>>m;
	set<int> s;
	for(int i = 1;i<=n;i++){
		cin>>A[i];
		s.insert(A[i]);
	}
	for(int i = 0;i<m;i++){
		int a,b;
		cin>>a>>b;
		g[a].pb(b);
		g[b].pb(a);
	}

	bool ok[n+1];
	memset(ok, 1, sizeof ok);

	int z = s.size();
	for(int i = 0;i < z - 1;i++){
		if(s.empty())break;
		auto in = *(s.begin());
		s.erase(in);
		if(s.empty())break;
		xx = in;
		for(int j = 1;j<=n;j++){
			for(auto p : g[j]){
				if(A[j] == i || A[p] == i){
					g[p].pb(j);
					g[j].pb(p);
				}
			}
		}

		memset(vis, 0, sizeof vis);
		for(int j = 1;j<=n;j++){
			if(!vis[j] && A[j] <= xx){
				sum = 0;
				cur.clear();
				dfs(j);

				if(sum < *(s.begin())){
					for(auto p : cur){
						ok[p] = false;
					}
				}
			}
		}
	}

	for(int i = 1;i<=n;i++)cout<< ok[i];
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35