Submission #493711

#	Time	Username	Problem	Language	Result	Execution time	Memory
493711		_Monkey_	Brunhilda’s Birthday (BOI13_brunhilda)	C++17	0 / 100	51 ms	78772 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;
int a[maxn],n,m,q,p,oo,ans,k,f[nn],ut[nn];
int t;
bool ok;
void check(){
    t=1;
    ok=0;
    for(int i=0;i<m;++i){
        k=t*a[i];
        if(t*a[i]<t || t*a[i]>oo || k/a[i]!=t){
            ok=1;
            return;
        }
        t=t*a[i];
    }
}
int sol(int z){
    if(f[z]>=0) return f[z];
    return f[z]=sol(z-ut[z])+1;
}
int main(){
    freopen("T.INP","r",stdin);
    freopen("T.OUT","w",stdout);
    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);
    memset(f,-1,sizeof f);
    f[0]=0;
    for(int i=0;i<m;++i){
        for(int j=1;j*a[i]<nn;j++){
            ut[j*a[i]-1]=max(a[i]-1,ut[j*a[i]-1]);
        }
    }
    int ma;
    for(int i=1;i<a[m-1];++i) ut[i]=i;
    for(int z=a[m-1];z<nn;++z)
        if(ut[z]==0){
            ma=0;
            for(int i=m-1;i>=0;--i){
                if(ma>=a[i]) break;
                if(z%a[i]>ma) ma=z%a[i];
            }
            ut[z]=ma;
        }
    oo=1e7;
    check();
    while(q--){
        cin >> n;
        if(ok){
            cout << sol(n);
        } else {
            if(n>=t){
                cout << "oo";
            } else {
                cout << sol(n);
            }
        }
        cout << el;
    }
    return 0;
}

Compilation message (stderr)

brunhilda.cpp: In function 'int main()':
brunhilda.cpp:28:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |     freopen("T.INP","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
brunhilda.cpp:29:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     freopen("T.OUT","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 60