Submission #860848

#	Time	Username	Problem	Language	Result	Execution time	Memory
860848		alexdd	Gift (IZhO18_nicegift)	C++17	7 / 100	2081 ms	62152 KiB

nicegift

#include<bits/stdc++.h>
using namespace std;
int n,k;
int a[1000005];
priority_queue<pair<int,int>> pq;
signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>k;
    int sum=0;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        sum += a[i];
        pq.push({a[i],i});
    }
    if(sum%k!=0)
    {
        cout<<-1;
        return 0;
    }
    cout<<sum/k<<"\n";
    while(!pq.empty())
    {
        vector<int> sc;
        cout<<1<<" ";
        for(int i=0;i<k;i++)
        {
            sc.push_back(pq.top().second);
            a[sc.back()]--;
            cout<<sc.back()<<" ";
            pq.pop();
        }
        cout<<"\n";
        for(auto x:sc)
            if(a[x]>0)
                pq.push({a[x],x});
    }
    return 0;
}
/**
4 2
2 3 3 2
*/

• Subtask 1: 7 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 51