Submission #1200860

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200860		Aiperiii	Stranded Far From Home (BOI22_island)	C++20	10 / 100	1095 ms	17192 KiB

island

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
const int N=2e5+5;
vector <int> g[N];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n,m;
    cin>>n>>m;
    vector <int> a(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    while(m--){
        int u,v;
        cin>>u>>v;
        g[u].pb(v);
        g[v].pb(u);
    }
    for(int i=1;i<=n;i++){
        set <pair <int,int> > st;
        int sum=0;
        st.insert({0,i});
        
        vector <int> vis(n+1);
        while(!st.empty()){
            
            int v=st.begin()->ss;
            int x=a[v];
            //cout<<v<<" "<<x<<"\n";
            st.erase(st.begin());
            if(x<=sum or (v==i && !vis[v])){
                sum+=x;
                vis[v]=1;
                for(auto to : g[v]){
                    if(!vis[to]){
                        st.insert({a[to],to});
                    }
                }
            }
            else{
                break;
            }
            
        }
        bool ok=1;
        for(int j=1;j<=n;j++){
            if(!vis[j]){
                
                ok=0;break;
            }
        }
        if(ok)cout<<1;
        else cout<<0;
    }
    cout<<"\n";
}
/*
 4 4
 2 2 4 3
 1 2
 1 3
 2 3
 3 4
 
 4 3
 4 2 2 1
 1 2
 3 2
 4 1
*/

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