Submission #522430

#	Time	Username	Problem	Language	Result	Execution time	Memory
522430		Hamed5001	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	238 ms	79172 KiB

brunhilda

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

const int mxN = 1e7+1;
int dp[mxN], dp2[mxN];

void solve() {
    int M, Q;
    cin >> M >> Q;
    vector<int> primes(M);
    for (auto &a : primes) cin >> a;
    
    for (auto p : primes) {
        for (int i = p; i <= mxN; i += p) {
            dp2[i - 1] = max(dp2[i - 1], p - 1);
        }
        dp2[mxN - 1] = max(dp2[mxN - 1], (mxN - 1) % p);
    }
    for (int i = mxN - 2; i >= 0; --i) {
        dp2[i] = max(dp2[i], dp2[i + 1] - 1);
    }
    
    dp[0] = 0;
    for (int i = 1; i < mxN; ++i) {
        dp[i] = 1e9;
        dp[i] = dp[i - dp2[i]] + 1;
    }
    
    while(Q--) {
        int n;
        cin >> n;
        int ans = dp[n];
        if (ans >= 1e9) cout << "oo\n";
        else cout << ans << '\n';
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    solve();
    return 0;
}

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