제출 #715405

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
715405		fuad27	Sirni (COCI17_sirni)	C++17	56 / 140	3405 ms	786432 KiB

sirni

#include<bits/stdc++.h>
using namespace std;
struct DSU {
  vector<int> e;
  DSU(int N) {e = vector<int>(N, -1);}
  int get(int x) { return e[x] < 0 ? x : e[x] = get(e[x]); }
  bool same_set(int a, int b) { return get(a) == get(b); }
  int size(int x) { return -e[get(x)]; }
  bool unite(int x, int y) {
    x = get(x), y = get(y);
    if (x == y) return false;
    if (e[x] > e[y]) swap(x, y);
    e[x] += e[y]; e[y] = x; return true;
  }
};
const int N=1e7+10;
vector<int> great(N,1e9);
vector<pair<int,int>> ed[N/2];
vector<int> v;
DSU d(1e5+10);
int main () {
  cin.tie(0)->sync_with_stdio(0);
  int n;
  cin >> n;
  v.resize(n);
  {
    for(int i = 0;i<n;i++) {
      cin >> v[i];
    }
    sort(v.begin(), v.end() );
    v.erase( unique( v.begin(), v.end() ), v.end() );
  }
  n=v.size();
  for(int i = 0;i<n;i++)great[v[i]]=i;
  for(int j =v[n-1];j>=0;j--) {
      great[j]=min(great[j],great[j+1]);
  }
  for(int i=0;i<n;i++) {
    for(int j=v[i];j<=v[n-1];j+=v[i]) {
      if(j!=v[i]) {
        if(great[j]<n) {
          ed[v[great[j]]-j].push_back({i,great[j]});
        }
      }
      else if(great[j+1]<n) {
        ed[v[great[j+1]]-j].push_back({i,great[j+1]});
      }
    }
  }
  long long sum=0;
  for(int i = 0;i<=v[n-1];i++) {
    for(auto j:ed[i]) {
      sum+=(int)d.unite(j.second,j.first)*i;
    }
  }
  cout << sum << "\n";
}

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