Submission #156534

#	Time	Username	Problem	Language	Result	Execution time	Memory
156534		combi1k1	Brunhilda’s Birthday (BOI13_brunhilda)	C++14	100 / 100	384 ms	79612 KiB

brunhilda

#include<bits/stdc++.h>

using namespace std;

const int   N   = 1e7 + 1;

int f[N];
int g[N];

int main()  {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int m;  cin >> m;
    int q;  cin >> q;

    for(int i = 1 ; i < N ; ++i)    f[i] = i;
    for(int i = 0 ; i < m ; ++i)    {
        int x;  cin >> x;
        for(int j = x ; j < N ; j += x)
            f[j - 1] = min(f[j - 1],j - x);
        f[N - 1] = min(f[N - 1],(N - 1) / x * x);
    }

    for(int i = N - 2 ; i ; --i)
        f[i] = min(f[i],f[i + 1]);

    for(int i = 1 ; i < N ; ++i)    {
        if (f[i] == i)
            g[i] = 1e9;
        else
            g[i] = g[f[i]] + 1;
    }

    //for(int i = 1 ; i < 10 ; ++i)
    //    cout << f[i] << " ";

    //cout << "\n";

    for(int i = 0 ; i < q ; ++i)    {
        int x;  cin >> x;
        if (g[x] >= 1e9)
            cout << "oo\n";
        else
            cout << g[x] << "\n";
    }
}

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