Submission #313955

#	Time	Username	Problem	Language	Result	Execution time	Memory
313955		shivensinha4	Brunhilda’s Birthday (BOI13_brunhilda)	C++17	0 / 100	307 ms	262148 KiB

brunhilda

#include <bits/stdc++.h> 
using namespace std; 
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> ii;
#define endl '\n'

const int MXV = 1e7;
vi facs[MXV+2];
int ans[MXV+2], curVal[MXV+2];


int main() {
	#ifdef shiven
	freopen("test.in", "r", stdin);
	#endif
	
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	int n, q; cin >> n >> q;
	vi primes(n);
	for_(i, 0, n) cin >> primes[i];
	for (int i: primes) for (int j = i; j <= MXV; j += i) facs[j].push_back(i);
	
	multiset<int> vals;
	for (int i: primes) vals.insert(0);
	
	for_(i, 1, MXV+1) {
		for (auto p: facs[i]) vals.erase(vals.find(curVal[p]));
		if (vals.size()) ans[i] = *vals.begin()+1;
		else ans[i] = -1;
		for (auto p: facs[i]) vals.insert(curVal[p] = ans[i]);
	}
	
	for_(x, 0, q) {
		int k; cin >> k;
		if (ans[k] == -1) cout << "oo";
		else cout << ans[k];
		cout << endl;
	}

	return 0;
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:29:11: warning: unused variable 'i' [-Wunused-variable]
   29 |  for (int i: primes) vals.insert(0);
      |           ^

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