Submission #242155

#	Time	Username	Problem	Language	Result	Execution time	Memory
242155		thecodingwizard	Brunhilda’s Birthday (BOI13_brunhilda)	C++11	5.56 / 100	1116 ms	262148 KiB

brunhilda

#include <bits/stdc++.h>

using namespace std;

#define ii pair<int, int>
#define f first
#define s second

int A[100000]; 
int dp[10000001]; 
vector<int> transitions[10000001];

int main() {
    int m, q; cin >> m >> q;
    for (int i = 0; i < m; i++) cin >> A[i];
    for (int i = 0; i < 1000001; i++) dp[i] = -1;
    dp[0] = 0;

    priority_queue<ii, vector<ii>, greater<ii>> pq;
    for (int i = 0; i < m; i++) {
        pq.push(make_pair(0, -A[i]));

        transitions[A[i]].push_back(A[i]);
    }

    while (!pq.empty()) {
        ii u = pq.top(); pq.pop();
        if (dp[u.f] == -1) continue;

        int mx = u.f - u.s;
        mx = min(mx, 10000001);
        for (int i = u.f + 1; i < mx; i++) {
            for (int x : transitions[i]) {
                pq.push({i, -x});
                if (i+x<10000001) transitions[i+x].push_back(x);
            }
            transitions[i].clear();
            if (dp[i] == -1) dp[i] = dp[u.f]+1;
        }

        // while (!pq.empty() && pq.top().f < mx) pq.pop();
    }

    for (int i = 0; i < q; i++) {
        int x; cin >> x;
        if (dp[x] == -1) cout << "oo" << "\n";
        else cout << dp[x] << "\n";
    }

    return 0;
}

• Subtask 1: 5.555555555555555 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 60