Submission #1170184

#	Time	Username	Problem	Language	Result	Execution time	Memory
1170184		nguyenkhangninh99	Sirni (COCI17_sirni)	C++17	84 / 140	5114 ms	828448 KiB

sirni

#include <bits/stdc++.h>

using namespace std;

int f[10000005];
struct DSU{
    int p[100005];
 
    void init(int n){
        for(int i = 1; i <= n; i++) p[i] = i;
    }
    int find(int u){
        return (p[u] == u ? u : p[u] = find(p[u]));
    }
 
    bool unon(int u, int v){
        u = find(u); 
        v = find(v);
        if(u == v) return false;
        p[v] = u;
        return true;
    }
} dsu;

void solve(){
    int n; cin >> n;
    
    vector<int> a(n + 1);
    for(int i = 1; i <= n; i++) cin >> a[i];
    
    sort(a.begin(), a.end());
    a.erase(unique(a.begin(), a.end()), a.end());
    
    for(int i = 1; i < a.size(); i++) f[a[i]] = i;
    for(int i = a.back() - 1; i >= 1; i--) if(f[i] == 0) f[i] = f[i + 1];
    dsu.init(n);
    
    vector<array<int, 3>> edge;
    
    for(int i = 1; i < a.size() - 1; i++){
        edge.push_back({a[i + 1] % a[i], i, i + 1});
        for(int j = a[i] * 2; j <= a.back(); j += a[i]) edge.push_back({a[f[j]] % a[i], i, f[j]});
    }
    
    sort(edge.begin(), edge.end());
    
    int ans = 0;
  
    for(auto [w, u, v]: edge) if(dsu.unon(u, v)) ans += w;

    cout << ans;

}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    
    solve();
    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14