Submission #1211107

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211107		PlayVoltz	Brunhilda’s Birthday (BOI13_brunhilda)	C++20	100 / 100	435 ms	235792 KiB

brunhilda

#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <chrono>
using namespace std;

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

int32_t main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, q, a;
	cin>>n>>q;
	vector<int> to(20000001), dp(10000001, 0);
	for (int i=1; i<20000001; ++i)to[i]=10000001;
	while (n--){
		cin>>a;
		for (int i=0; i<10000001; i+=a)to[i+a-1]=min(to[i+a-1], i);
	}
	for (int i=19999999; i>=0; --i)to[i]=min(to[i], to[i+1]);
	for (int i=1; i<10000001; ++i){
		if (to[i]>=i)dp[i]=10000001;
		else dp[i]=dp[to[i]]+1;
	}
	while (q--){
		cin>>a;
		if (dp[a]>10000000)cout<<"oo\n";
		else cout<<dp[a]<<"\n";
	}
}

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