제출 #984239

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
984239		farica	Sirni (COCI17_sirni)	C++14	0 / 140	1055 ms	133036 KiB

sirni

#include <bits/stdc++.h>
#define int long long

using namespace std;

const int MAX_N = 10000001, MAX_SIZ = 100000;

int T[MAX_N], parent[MAX_SIZ], siz[MAX_SIZ];

int find_parent(int x) {
    if(parent[x] == x) return x;
    return parent[x] = find_parent(parent[x]);
}

void unite(int a, int b) {
    int x = find_parent(a), y = find_parent(b);
    if(x==y) return;
    if(siz[x] < siz[y]) swap(x,y);
    siz[x] += siz[y];
    parent[y] = x;
}

void solve() {
    int n;
    cin >> n;
    int a[n];
    for(int i=0; i<n; ++i) {
        cin >> a[i];
        parent[i] = i;
        siz[i] = 1;
    }
    sort(a, a+n);
    for(int i=0; i<n; ++i) T[a[i]] = i + 1;
    for(int i=a[n-1]; i>0; --i) {
        if(T[i]) continue;
        T[i] = T[i+1];
    }
    int ans = 0;
    priority_queue<pair<int,pair<int,int>>>pq;
    for(int i=0; i<n-1; ++i) {
        for(int j=a[i]; j<=a[n-1]; j+=a[i]) {
            int x, p;
            if(j==a[i]) x = a[T[a[i]+1]-1], p = T[a[i]+1];
            else x = a[T[j]-1], p = T[j];
            if(x > j+a[i]) continue;
            pq.push({-1 * x%a[i], {p-1, i}});
        }
    }
    while(!pq.empty()) {
        int w = -pq.top().first, x = pq.top().second.first, y = pq.top().second.second;
        pq.pop();
        if(find_parent(x) == find_parent(y)) continue;
        unite(x, y);
        ans += w;
    }
    cout << ans << endl;
}

signed main()
{
    int t=1;
    while(t--) solve();

    return 0;
}

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