Submission #1125898

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125898		Agageldi	Brunhilda’s Birthday (BOI13_brunhilda)	C++20	45.71 / 100	1101 ms	149596 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 = -1, vip[N];
vector <ll> a;

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

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 5.7143 / 60