Submission #393452

#	Time	Username	Problem	Language	Result	Execution time	Memory
393452		ngpin04	Sirni (COCI17_sirni)	C++14	140 / 140	4536 ms	613000 KiB

sirni

#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
using namespace std;
const int N = 1e7 + 5; 

vector <pair <int, int>> edge[N];

int a[N];
int p[N];
int par[N];
int n;

bool mini(int &a, int b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}

int getpar(int u) {
	return (par[u] < 0) ? u : (par[u] = getpar(par[u]));
}

bool join(int u, int v) {
	u = getpar(u);
	v = getpar(v);
	if (u == v)
		return false;
	if (par[u] > par[v])
		swap(u, v);
	par[u] += par[v];
	par[v] = u;	
	return true;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;

	int mx = 0;
	for (int i = 1; i <= n; i++)  {
		int x; cin >> x;
		p[x] = x;
		mx = max(mx, x);
	}

	for (int i = mx - 1; i >= 1; i--) 
		if (!p[i])
			p[i] = p[i + 1];

	for (int i = 1; i <= mx; i++) if (p[i] == i) {
		if (i < mx && p[i + 1] < i + i) {
			edge[p[i + 1] - i].push_back(mp(i, p[i + 1]));
		}
			 

		for (int j = 2 * i; j <= mx; j += i) {
			// cout << p[j] << " " << j << "\n";
			if (p[j] < j + i) 
				edge[p[j] - j].push_back(mp(i, p[j]));
		}
	}

	for (int i = 1; i <= mx; i++)
		par[i] = -1;
	long long ans = 0;
	for (int i = 0; i <= mx; i++) 
	for (pair <int, int> e : edge[i]) 
		ans += i * join(e.fi, e.se);
	cout << ans;
	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