Submission #722041

#	Time	Username	Problem	Language	Result	Execution time	Memory
722041		PoPularPlusPlus	Brunhilda’s Birthday (BOI13_brunhilda)	C++17	20 / 100	44 ms	20808 KiB

brunhilda

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

bool remender(ll a , ll b){return a%b;}

//freopen("problemname.in", "r", stdin);
//freopen("problemname.out", "w", stdout);

const int N = 100002;
int ans[N];
vector<int> v[N];

void solve(){
	int n , qu;
	cin >> n >> qu;
	int arr[n];
	for(int i = 0; i < n; i++)cin >> arr[i];
	int mx = 0;
	for(int i = 0; i < n; i++)mx = max(mx , arr[i]);
	for(int i = 0; i < n; i++){
		for(int j = arr[i]; j <= N-2; j+=arr[i]){
			v[j].pb(i);
		}
	}
	int cur[n];
	queue<pair<int,int>> q;
	for(int i = 0; i < n; i++){
		cur[i] = 0;
		q.push(mp(0,i));
	}
	ans[0] = 0;
	for(int i = 1; i <= N-2; i++){
		ans[i] = 1e9;
		for(int j : v[i]){
			q.push(mp(i,j));
			cur[j] = i;
		}
		while(q.size()){
			pair<int,int> p = q.front();
			if(cur[p.vs] == p.vf)break;
			q.pop();
		}
		ans[i] = ans[q.front().vf]+1;
	}
	while(qu--){
		int x;
		cin >> x;
		if(ans[x] >= 1e9)cout << "oo\n";
		else cout << ans[x] << '\n';
	}
}

int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
   // int t;cin>>t;
   // while(t--){
		solve();
	//}
	return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 60