Submission #1125882

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125882		Agageldi	Brunhilda’s Birthday (BOI13_brunhilda)	C++20	3.33 / 100	1099 ms	149652 KiB

brunhilda

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

#define ll long long
#define N 40000005
#define ff first
#define ss second
#define pb push_back
#define sz(s) (int)s.size()

ll n, m, q, vis[N], p, vip[N];
string s, g, h;
vector <ll> a;

int main () {
	ios::sync_with_stdio(0);cin.tie(0);
	cin >> m >> q;
	for(int i= 1;i<=m;i++) {
		ll x;
		cin >> x;
		if(vip[x]) continue;
		vip[x] = 1;
		for(ll j = x; j <= 1e7; j += x) {
			vis[j]++;
		}
		a.pb(x);
	}
	for(ll j = 2; j <= 1e7; j++) {
		if(vis[j] == m) {
			p = j;
			break;
		}
	}
	sort(a.rbegin(),a.rend());
	for(int j = 1;j<=q;j++) {
		int x, cnt = 0, tr = 0;
		cin >> x;
		if(x % p == 0) {
			cout << "oo\n";
			continue;
		}
		while(x != 0) {
			if(a[0] > x) {
				cnt++;
				break;
			}
			int mx = INT_MAX;
			for(auto i : a) {
				if(mx > (x / i) * i) mx = (x / i) * i;
				if(i - 1 <= x - mx) break;
			}
			x = mx;
			cnt++;
		}
		if(!tr)cout << cnt << '\n';
	}
}

• Subtask 1: 3.3333 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 60