oj.uz

Submission #748662

# Submission time Handle Problem Language Result Execution time Memory
748662 2023-05-26T17:30:05 Z GrindMachine Stranded Far From Home (BOI22_island) C++17
0 / 100
 1000 ms 29948 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 2e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

struct DSU {
    vector<int> par, rankk, siz;
    vector<ll> val;

    DSU() {

    }

    DSU(int n) {
        init(n);
    }

    void init(int n) {
        par = vector<int>(n + 1);
        rankk = vector<int>(n + 1);
        siz = vector<int>(n + 1);
        val = vector<ll>(n + 1);
        rep(i, n + 1) create(i);
    }

    void create(int u) {
        par[u] = u;
        rankk[u] = 0;
        siz[u] = 1;
    }

    int find(int u) {
        if (u == par[u]) return u;
        else return par[u] = find(par[u]);
    }

    bool same(int u, int v) {
        return find(u) == find(v);
    }

    void merge(int u, int v) {
        u = find(u), v = find(v);
        if (u == v) return;

        if (rankk[u] == rankk[v]) rankk[u]++;
        if (rankk[u] < rankk[v]) swap(u, v);

        par[v] = u;
        siz[u] += siz[v];
        val[u] += val[v];
    }
};

vector<ll> adj[N];

void solve(int test_case)
{
    ll n,m; cin >> n >> m;
    vector<ll> a(n+5);
    rep1(i,n) cin >> a[i];

    vector<pll> edges;
    rep1(i,m){
        ll u,v; cin >> u >> v;
        edges.pb({u,v});
        adj[u].pb(v), adj[v].pb(u);
    }

    vector<pll> order;
    rep1(i,n) order.pb({a[i],i});

    sort(rall(order));

    vector<ll> good(n+5);

    for(auto [val,i] : order){
        DSU dsu(n+5);
        rep1(i,n) dsu.val[i] = a[i];

        for(auto [u,v] : edges){
            if(a[u] <= val and a[v] <= val){
                dsu.merge(u,v);
            }
        }

        if(dsu.siz[dsu.find(i)] == n){
            good[i] = 1;
            conts;
        }

        ll curr_sum = dsu.val[dsu.find(i)];

        rep1(u,n){
            if(dsu.same(u,i)){
                trav(v,adj[u]){
                    if(curr_sum >= a[v]){
                        good[u] |= good[v];
                    }
                }
            }
        }
    }

    rep1(i,n) cout << good[i];
    cout << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5024 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Incorrect 54 ms 5236 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Execution timed out 1072 ms 29948 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Execution timed out 1064 ms 28812 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Execution timed out 1066 ms 29884 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5024 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Incorrect 54 ms 5236 KB Output isn't correct
5 Halted 0 ms 0 KB -