Submission #1127215

#	Time	Username	Problem	Language	Result	Execution time	Memory
1127215		steveonalex	Džumbus (COCI19_dzumbus)	C++20	110 / 110	67 ms	27460 KiB

dzumbus

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}

ll gcd(ll a, ll b){
    while(a > 0 && b > 0){
        if (a > b) a %= b;
        else b %= a;
    }
    return a + b;
}
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(mask);}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n"){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }


template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

struct DSU{
    int n;
    vector<int> parent, sz;

    DSU(int _n){
        n = _n;
        parent.resize(n+1); sz.resize(n+1, 1);
        for(int i = 1; i<=n; ++i) parent[i] = i;
    }

    int find_set(int u){return (u == parent[u]) ? u : (parent[u] = find_set(parent[u]));}
    bool same_set(int u, int v){return find_set(u) == find_set(v);}

    bool join_set(int u, int v){
        u = find_set(u), v = find_set(v);
        if (u != v){
            if (sz[u] < sz[v]) swap(u, v);
            parent[v] = u;
            sz[u] += sz[v];
            return true;
        }
        return false;
    }

    int get_size(int u){return sz[find_set(u)];}
};

const int N = 1100;
const ll INF = 1e18 + 69;
int n, m; 
vector<int> graph[N];
ll a[N];
int sz[N];
ll dp[N][N][3];

void dfs(int u, int p){
    sz[u] = 1;
    dp[u][0][0] = 0;
    dp[u][1][1] = a[u];
    for(int v: graph[u]) if (v != p){
        dfs(v, u);

        ll f[sz[u] + sz[v] + 1][3];
        for(int i = 0; i <= sz[u] + sz[v]; ++i) for(int j = 0; j < 3; ++j) f[i][j] = INF;
        for(int i = 0; i <= sz[u]; ++i) for(int x = 0; x < 3; ++x) 
        for(int j = 0; j <= sz[v]; ++j) for(int y = 0; y < 3; ++y){
            if (x == 0 && y == 1) continue;
            int nxt = x;
            if (x > 0 && y > 0) nxt = 2;
            minimize(f[i + j][nxt], dp[u][i][x] + dp[v][j][y]);
        }

        for(int i = 0; i <= sz[u] + sz[v]; ++i) for(int j = 0; j < 3; ++j) dp[u][i][j] = f[i][j];
        sz[u] += sz[v];
    }

    // cout << "Node: " << u << "\n";
    // for(int j = 0; j <= sz[u]; ++j){
    //     for(int x = 0; x < 3; ++x) cout << dp[u][j][x] << " ";
    //     cout << "\n";
    // }
}

void solve(){
    cin >> n >> m;
    for(int i = 1; i<=n; ++i) cin >> a[i];
    DSU mst(n);
    for(int i = 0; i<m; ++i){
        int u, v; cin >> u >> v;
        graph[u].push_back(v);
        graph[v].push_back(u);
        mst.join_set(u, v);
    }
    for(int i = 1; i<=n; ++i) if (mst.find_set(i) == i) {
        graph[i].push_back(0);
        graph[0].push_back(i);

        mst.join_set(i, 0);
    }

    a[0] = INF;

    for(int i = 0; i <= n; ++i) for(int j = 0; j <= n; ++j) for(int x = 0; x < 3; ++x) dp[i][j][x]  = INF;

    dfs(0, 0);

    vector<pair<ll, ll>> best;
    for(int j = 0; j <= n; ++j) {
        while(best.size() && best.back().first >= dp[0][j][0]) best.pop_back();
        best.push_back({dp[0][j][0], j});
    }

    int q; cin >> q;
    while(q--){
        int x; cin >> x;
        pair<ll, ll> cur = make_pair(x + 1, -1);
        int idx = upper_bound(ALL(best), cur) - best.begin() - 1;

        cout << best[idx].second << "\n";
    }
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    clock_t start = clock();

    solve();


    cerr << "Time elapsed: " << clock() - start << "ms!\n";
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 30 / 30
• Subtask 4: 30 / 30