Submission #1305579

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305579		xanlar2009	Stranded Far From Home (BOI22_island)	C++20	0 / 100	1 ms	576 KiB

island

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define run  ios_base::sync_with_stdio(false);cin.tie(0);

#define ln length()
#define ll long long
#define pll pair<ll, ll>
#define ull unsigned ll
#define ld long double
#define endl "\n"
#define pb push_back
#define fi first
#define se second
 
#define pi acos(-1)
#define N 2007
#define INF 10000000000000000
#define minimum -9000000000000000000
#define maximum -minimum
#define mod 998244353
 
using namespace std;

//using namespace __gnu_pbds;
//template <class t>
//using ordered_set=tree<t, null_type,less<t>, rb_tree_tag,tree_order_statistics_node_update>;

//mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

ll gcd(ll a, ll b)
{
	if(b==0)
		return a;
	return gcd(b, a%b);
}

ll lcm(ll a, ll b)
{
	return a/gcd(a, b)*b;
}

bool isprime(ll n)
{
	if(n==1)
		return 1;
	for(ll i=2; i*i<=n; i++)
	{
		if(n%i==0)
			return 0;
	}
	return 1;
}
 
ll binpow(ll a, ll b)
{
    a%=mod;
    ll res=1;
    while(b>0)
	{
        if(b%2==1)
            res=(res*a)%mod;
        a=(a*a)%mod;
        b/=2;
    }
    return res;
}

ll n, m;
ll a[N];
vector<ll>v[N];
bool used[N];
priority_queue<pll, vector<pll>, greater<pll>>pq;

void dijk(ll node)
{
	ll tot=a[node];
	for(ll i:v[node])
	{
		pq.push({a[i], i});
	}
	while(!pq.empty())
	{
		ll t=pq.top().second;
		ll d=pq.top().first;
		pq.pop();
		if(d>tot)
		{
			return;
		}
		used[t]=1;
		tot+=d;
		for(ll i:v[t])
		{
			if(!used[i])
			{
				pq.push({a[i], i});
			}
		}
	}
}

int main()
{
	run;
	cin>>n>>m;
	for(ll i=1; i<=n; i++)
	{
		cin>>a[i];
	}
	for(ll i=1; i<=m; i++)
	{
		ll x, y;
		cin>>x>>y;
		v[x].pb(y);
		v[y].pb(x);
	}
	for(ll i=1; i<=n; i++)
	{
		for(ll j=1; j<=n; j++)
		{
			used[j]=0;
		}
		dijk(i);
		bool bul=1;
		for(ll j=1; j<=n; j++)
		{
			if(!used[j])
				bul=0;
		}
		if(bul)
			cout<<1;
		else
			cout<<0;
	}
}
/*
6 1 3
8 1 2 1 5 4
*/
// By Xanlar

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