Submission #713947

#	Time	Username	Problem	Language	Result	Execution time	Memory
713947		stevancv	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	458 ms	157440 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 = 2e7 + 2;
const int inf = 1e9;
int dp[M], gde[M];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        int x; cin >> x;
        for (int j = x - 1; j < M; j += x) gde[j] = x - 1;
    }
    for (int i = M - 2; i >= 1; i--) {
        smax(gde[i], gde[i + 1] - 1);
    }
    for (int i = 1; i < M; i++) {
        if (gde[i] > 0) dp[i] = dp[i - gde[i]] + 1;
        else dp[i] = inf;
    }
    for (int i = 1; i <= q; i++) {
        int x; cin >> x;
        if (dp[x] >= inf) cout << "oo" << en;
        else cout << dp[x] << en;
    }
    return 0;
}

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