제출 #991074

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
991074		BF001	Sirni (COCI17_sirni)	C++17	140 / 140	1024 ms	749032 KiB

sirni

#include <bits/stdc++.h>
using namespace std;


#define N 100005
#define se second
#define fi first

int n, par[N];
long long res = 0;
vector<int> p;

struct ii
{
	int u, v, w;
	bool operator < (ii o){
		return w < o.w;
	}
};

int find(int u){
	if (u == par[u]) return u;
	return par[u] = find(par[u]);
}

void unin(int u, int v, int w){
	u = find(u);
	v = find(v);
	if (u == v) return;
	par[u] = v;
	res += w;
}

void sub1(){
    for (int i = 0; i < n; i++) par[i] = i;
    vector<ii> eg;
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            if (i == j) continue;
            eg.push_back({i, j, p[j] % p[i]});
        }
    }
    sort(eg.begin(), eg.end());
    for (auto x : eg){
        unin(x.u, x.v, x.w);
    }
    cout << res;
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
        
    cin >> n;
    for (int i = 1; i <= n; i++){
    	int val;
    	cin >> val;
    	p.push_back(val);
    }

    if (n <= 1000){ 
        sub1();
        return 0;
    }

    sort(p.begin(), p.end());
    p.resize(unique(p.begin(), p.end()) - p.begin());

    int ma = p.back();
    vector<int> near(ma + 1, -1);
    vector<vector<pair<int, int>>> eg(ma + 1);

    for (int i = 0; i < (int) p.size(); i++){
    	par[i] = i;
    	near[p[i]] = i;
    }

    for (int i = ma - 1; i >= 0; i--){
    	if (near[i] == -1) near[i] = near[i + 1];
    }

    for (int i = 0; i < (int) p.size(); i++){
    	eg[(p[i + 1] % p[i])].push_back({i, i + 1});
    	for (int j = 2 * p[i]; j <= ma; j += p[i]){
    		int pos = near[j];
    		if (pos == -1) continue;
    		eg[(p[pos] % p[i])].push_back({i, pos});
    	}
    }

    for (int i = 0; i <= ma; i++){
    	for (auto x : eg[i]){
    		unin(x.fi, x.se, i);
    	}
    }

    cout << res;

    return 0;
}     

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