Submission #758754

#	Time	Username	Problem	Language	Result	Execution time	Memory
758754		Hanksburger	Kitchen (BOI19_kitchen)	C++17	51 / 100	36 ms	680 KiB

kitchen

#include <bits/stdc++.h>
using namespace std;
int a[305], B[305], b[305], dp[90005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, M, k, x1=0, ans=1e9;
    cin >> n >> M >> k;
    if (k==1)
    {
        int sum=0;
        for (int i=1; i<=n; i++)
        {
            cin >> a[i];
            sum+=a[i];
        }
        dp[0]=1;
        for (int i=1; i<=M; i++)
        {
            cin >> b[i];
            for (int j=90000; j>=b[i]; j--)
                dp[j]+=dp[j-b[i]];
        }
        for (int i=sum; i<=90000; i++)
        {
            if (dp[i])
            {
                cout << i-sum;
                return 0;
            }
        }
        cout << "Impossible";
        return 0;
    }
    for (int i=1; i<=n; i++)
    {
        cin >> a[i];
        x1+=a[i];
    }
    for (int i=1; i<=M; i++)
        cin >> B[i];
    for (int z=1; z<(1<<M); z++)
    {
        int m=0, x2=0;
        for (int zz=0; zz<M; zz++)
        {
            if (z&(1<<zz))
            {
                m++;
                b[m]=B[zz+1];
                x2+=b[m];
            }
        }
        bool ok=1;
        if (m<k || x1>x2)
        {
            ok=0;
            continue;
        }
        sort(b+1, b+m+1);
        for (int i=1; i<=n; i++)
        {
//            cout << "a[i]=" << a[i] << ' ';
            if (a[i]<k)
            {
                ok=0;
                break;
            }
            for (int j=m-k+1; j<=m; j++)
            {
                b[j]--;
//                cout << "subtract " << b[j] << ' ';
                if (b[j]<0)
                {
                    ok=0;
//                    cout << "out\n";
                    break;
                }
            }
            if (!ok)
                break;
            sort(b+1, b+m+1);
            int l=0, r=300;
            while (l<r)
            {
                int mid=(l+r)/2, sum=0;
                for (int j=m; j>=1; j--)
                {
                    if (b[j]<mid)
                        break;
                    sum+=b[j]-mid;
                }
                if (sum<=a[i]-k)
                    r=mid;
                else
                    l=mid+1;
            }
//            cout << "l=" << l << ' ';
            int sum=0;
            for (int j=m; j>=1; j--)
            {
                if (b[j]<l)
                    break;
                sum+=b[j]-l;
//                cout << "subtract " << b[j]-l << ' ';
                b[j]=l;
            }
            sort(b+1, b+m+1);
            for (int j=m; j>=m-(a[i]-k-sum)+1; j--)
            {
                b[j]--;
//                cout << "subtract " << b[j] << ' ';
            }
            sort(b+1, b+m+1);
//            cout << "i=" << i << " over\n";
        }
        if (ok)
            ans=min(ans, x2-x1);
    }
    if (ans==1e9)
        cout << "Impossible";
    else
        cout << ans;
}

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 20 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 28