Submission #742836

#	Time	Username	Problem	Language	Result	Execution time	Memory
742836		irmuun	Brunhilda’s Birthday (BOI13_brunhilda)	C++17	97.78 / 100	601 ms	159024 KiB

brunhilda

#include<bits/stdc++.h>
 
using namespace std;
 
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define all(s) s.begin(),s.end()

const int MAX=2e7+5;

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int m,q;
    cin>>m>>q;
    int p[m+5];
    for(int i=1;i<=m;i++){
        cin>>p[i];
    }
    vector<int>mn(MAX,MAX);
    for(int i=1;i<=m;i++){
        for(int k=0;(k+1)*p[i]<MAX;k++){
            mn[(k+1)*p[i]-1]=min(mn[(k+1)*p[i]-1],k*p[i]);
        }
    }
    for(int i=MAX-2;i>=0;i--){
        mn[i]=min(mn[i],mn[i+1]);
    }
    vector<int>ans(MAX);
    for(int i=1;i<MAX;i++){
        if(mn[i]==i||mn[i]==MAX){
            ans[i]=MAX;
        }
        else{
            ans[i]=ans[mn[i]]+1;
        }
    }
    while(q--){
        int n;
        cin>>n;
        if(ans[n]==MAX){
            cout<<"oo\n";
        }
        else{
            cout<<ans[n]<<"\n";
        }
    }
}

• Subtask 1: 17.77777777777778 / 20
• Subtask 2: 20 / 20
• Subtask 3: 60 / 60