Submission #711982

#	Time	Username	Problem	Language	Result	Execution time	Memory
711982		stevancv	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	20 / 100	1088 ms	123312 KiB

brunhilda

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
const int M = 1e6 + 2;
const int inf = 1e9;
vector<int> primes[M];
int idx[M], ans[N], koji[M], dp[M];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, q;
    cin >> n >> q;
    multiset<pair<int, int>> s;
    for (int i = 0; i < n; i++) {
        int x; cin >> x;
        s.insert({0, x});
        for (int j = x; j < M; j += x) primes[j].push_back(x);
    }
    for (int i = 1; i <= q; i++) {
        int x; cin >> x;
        idx[x] = i;
    }
    for (int i = 1; i < M; i++) {
        dp[i] = inf;
        for (int j : primes[i]) {
            s.erase({koji[j], j});
        }
        if (!s.empty()) dp[i] = s.begin()->first + 1;
        if (idx[i] != 0) ans[idx[i]] = dp[i];
        for (int j : primes[i]) {
            s.insert({dp[i], j});
            koji[j] = dp[i];
        }
    }
    for (int i = 1; i <= q; i++) {
        if (ans[i] >= inf) cout << "oo" << en;
        else cout << ans[i] << en;
    }
    return 0;
}

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