Submission #155730

#	Time	Username	Problem	Language	Result	Execution time	Memory
155730		atoiz	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	47 ms	1476 KiB

brunhilda

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

const int MAXM = 100007, MAXA = 1000007, MAXV = 10000007;
int Q, M;
int P[MAXM], R[MAXA], last;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> M >> Q;
    for (int i = 0; i < M; ++i) cin >> P[i];

    R[last = 0] = 0;
    while (R[last] < MAXV) {
        int nxt = -1;
        for (int i = 0; i < M; ++i) nxt = max(nxt, R[last] - (R[last] % P[i]) + P[i] - 1);
        if (nxt <= R[last]) break;
        R[++last] = nxt;
    }

    for (int q = 0; q < Q; ++q) {
        int x;
        cin >> x;
        if (x > R[last]) cout << "oo\n";
        else cout << lower_bound(R, R + last + 1, x) - R << '\n';
    }
}

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