Submission #371237

#	Time	Username	Problem	Language	Result	Execution time	Memory
371237		FatihSolak	Sirni (COCI17_sirni)	C++17	140 / 140	2659 ms	634100 KiB

sirni

#include <bits/stdc++.h>
#define N 100005
#define M 10000005
using namespace std;
int par[N];
int nxt[M];
int pos[M];
vector<pair<int,int>> v[M];
int find(int a){
	if(a == par[a])return a;
	return par[a] = find(par[a]);
}
bool unite(int a,int b){
	a = find(a);
	b = find(b);
	if(a == b)return 0;
	par[b] = a;
	return 1;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	//freopen("in.txt","r",stdin);
	//freopen("out.txt","w",stdout);
	int n;
	cin >> n;
	int maxi = 0;
	for(int i=1;i<=n;i++){
		int a;
		cin >> a;
		pos[a] = i;
		maxi = max(maxi,a);
	}
	vector<int> nums;
	for(int i=maxi;i>=0;i--){
		if(pos[i]){
			nxt[i] = i;
			nums.push_back(i);
		}
		else nxt[i] = nxt[i+1];
	}
	for(auto u:nums){
		int before = -1;
		for(int i=u;i<=maxi;i+=u){
			int p = nxt[i+(i==u)];
			if(p && p != before)
				v[p%u].push_back({pos[u],pos[p]});
			before = p;
		}
	}
	for(int i=0;i<n;i++){
		par[i] = i;
	}
	long long ans = 0;
	for(int i=0;i<=maxi;i++){
		for(auto u:v[i]){
			if(unite(u.first,u.second))ans+=i;
		}
	}
	cout << ans;
}

• 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