Submission #723073

#	Time	Username	Problem	Language	Result	Execution time	Memory
723073		Mr_Husanboy	Stranded Far From Home (BOI22_island)	C++17	10 / 100	1072 ms	18332 KiB

island

#include<bits/stdc++.h>

using namespace std;
using ll = long long;


void solve(){
    int n, m; cin >> n >> m;
    if(n == 1){
        cout << '1'; return;
    }
    vector<int> s(n);
    for(auto &u : s) cin >> u;
    vector<vector<int>> g(n);
    for(int i = 0; i < m; i ++){
        int u, v; cin >> u >> v;
        u --; v --;
        g[u].push_back(v); g[v].push_back(u);
    }
    vector<int> us(n);
    auto com = [&](auto &com, int i)->int{
        int res = 0;
        us[i] = 1;
        for(auto u : g[i]){
            if(us[u]) continue;
            res += com(com, u) + 1;
        }
        return res;
    };
    if(com(com, 0) != n - 1){
        cout << string(n,'0');
        return;
    }
    auto check = [&](int i)->int{
        priority_queue<pair<int,int>> q;
        ll cur = s[i];
        vector<int> used(n);
        used[i] = 1;
        for(auto u : g[i]){
            q.push({-s[u], u});
            used[u] = 1;
        }
        int cnt = 1;
        while(!q.empty()){
            int t = q.top().second;
            q.pop();
            //cout << t + 1 << endl;
            if(s[t] <= cur){
                cur += s[t];
                cnt ++;
            }else{
                return 0;
            }

            for(auto u : g[t]){
                if(used[u]) continue;
                used[u] = 1;
                q.push({-s[u], u});
            }
        }
        //for(auto u : used) cout << u << ' '; cout<< endl;
        return cnt == n;
    };

    for(int i = 0; i < n; i ++){
        cout << check(i);
        #ifdef LOCAL 
        cout << endl; 
        #endif 
    }
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int testcases = 1;
    //cin >> testcases;
    while(testcases --){
        solve();
        if(testcases) cout << '\n';
        #ifdef LOCAL
        else cout << '\n';
        cout << "___________________" << endl;
        #endif
    }
    return 0;
}

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