Submission #493723

#	Time	Username	Problem	Language	Result	Execution time	Memory
493723		_Monkey_	Brunhilda’s Birthday (BOI13_brunhilda)	C++17	77.46 / 100	232 ms	81044 KiB

brunhilda

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define el '\n'
#define ld long double
const int maxn=1e5+1,nn=1e7+1;
void amax(int &x,int y){if(y>x)x=y;}
int a[maxn],f[nn],ut[nn];
int m,n,q,oo=1e9,p;
bool ok;
int take(int z){
    if(f[z]>=0) return f[z];
    if(ut[z]==0){
        f[z]=oo;
    } else {
        f[z]=min(oo,take(z-ut[z])+1);
    }
    return f[z];
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin >> m >> q;
    for(int i=0;i<m;++i) cin >> a[i];
    sort(a+0,a+m);
    for(int i=0;i<m;++i)
        for(int j=a[i]-1;j<nn;j+=a[i]) ut[j]=a[i]-1;
    for(int i=nn-2;i>0;--i) amax(ut[i],ut[i+1]-1);
    memset(f,-1,sizeof f);
    f[0]=0;
    while(q--){
        cin >> n;
        p=take(n);
        if(p==oo){
            cout << "oo" << el;
        } else {
            cout << p << el;
        }
    }
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 18.88888888888889 / 20
• Subtask 3: 38.57142857142857 / 60