Submission #714634

#	Time	Username	Problem	Language	Result	Execution time	Memory
714634		Ferid20072020	Stranded Far From Home (BOI22_island)	C++14	0 / 100	42 ms	724 KiB

island

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2,fma")

#include <bits/stdc++.h>

using namespace std;

#define ll          long long 
#define ull         unsigned long long 
#define ld          long double 
#define ui          unsigned int 
#define f           first
#define s           second
#define ins         insert
#define pb          push_back
#define mp          make_pair
#define ln          '\n'
#define int         ll
#define pii         pair<int , int> 
#define INF         LLONG_MAX
#define vv(a)       vector<a>
#define pp(a, b)    pair<a, b>
#define pq(a)       priority_queue<a>
#define qq(a)       queue<a>
#define ss(a)       set<a>
#define mss(a)      multiset<a>
#define mm(a, b)    map<a, b>
#define mmm(a , b)  multimap<a , b>
#define sz(x)       (x).size()
#define all(x)      (x).begin() , (x).end()
#define fastio                    \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

const int MAX = 2005;
int n , m;
vv(vv(pii)) g(MAX);
vv(int) tot(MAX);
vv(int) color(MAX);
int cnt = 0 , total = 0;

void init(){
    cnt = 1;
    total = 0;
    for(int i=1 ; i<MAX ; i++){
        color[i] = 0;
    }
}

void DFS(int src){
    color[src] = 1;
    for(auto to : g[src]){
        if(color[to.s] == 0 && to.f <= total){
            cnt++;
            total += to.f;
            DFS(to.s);
        }
    }
}

void solve(){
    cin >> n >> m;
    for(int i=1 ; i<=n ; i++){
        cin >> tot[i];
    }
    for(int i=0 ; i<m ; i++){
        int u , v;
        cin >> u >> v;
        g[u].pb({tot[v] , v});
        g[v].pb({tot[u] , u});
    }
    for(int i=1 ; i<=n ; i++){
        sort(all(g[i]));
    }
    for(int i=1 ; i<=n ; i++){
        init();
        total = tot[i];
        DFS(i);
        while(cnt < n){
            int cnt1 = cnt;
            DFS(i);
            if(cnt1 == cnt){
                break;
            }
        }
        if(cnt == n){
            cout << 1;
        }
        else{
            cout << 0;
        }
    }
}


signed main(){
    fastio

    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }

    return 0;
}

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