Submission #856140

#	Time	Username	Problem	Language	Result	Execution time	Memory
856140		vjudge1	Sirni (COCI17_sirni)	C++17	0 / 140	5101 ms	199632 KiB

sirni

//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

struct DSU {
    int n;
    vector <int> par;
    DSU(int n) : n(n) {
        par.resize(n);
        iota(par.begin(), par.end(), 0);
    }

    inline int get(int a) {
        return par[a] = (par[a] == a ? a : get(par[a]));
    }

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

    bool unite(int u, int v) {
        if(same(u, v))
            return false;

        par[get(u)] = get(v);
        return true;
    }
};

#define ONLINE_JUDGE
void solve() {
    int n;
    cin >> n;

    vector <int> vec(n);
    for(int &i : vec)
        cin >> i;
        
    priority_queue <tuple <int, int, int>, vector <tuple <int, int, int>>, greater <tuple <int, int, int>>> pq;
    for(int i = 0; i < int(13E6); i++) {
        int a = rand() % n, b = rand() % n;
        pq.emplace(min(vec[a] % vec[b], vec[b] % vec[a]), a, b);
    }

    i64 res = 0;
    DSU dsu(n);
    while(!pq.empty()) {
        auto [c, u, v] = pq.top();
        pq.pop();

        if(dsu.unite(u, v)) {
            res += c;
        }
    }

    cout << res;
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
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• Subtask 10: 0 / 14