Submission #1193656

#	Time	Username	Problem	Language	Result	Execution time	Memory
1193656		yhx3	Kitchen (BOI19_kitchen)	C++20	0 / 100	1095 ms	836 KiB

kitchen

#include<bits/stdc++.h>
#include<iostream>
#include<vector>

using namespace std;
#define ll long long



void rec(vector<int> &b, set<int> &sums, vector<int> lst, int &k, int &m, int sm) {
    int str = lst.empty() ? 0 : lst.back() + 1;
    int sz = lst.size();
    for (int i = str; i < m; i++) {
        vector<int> cs(lst.begin(), lst.end());
        cs.push_back(i);
        if (cs.size() >= k) sums.insert(sm + b[i]);
        rec(b,sums,cs,k,m,sm+b[i]);
    }
}
void solve() {  
    int n,m,k;
    cin >> n >> m >> k;
    vector<int> a(n);
    vector<int> b(m);
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    
    for (int i = 0; i < m; i++)
    {
        cin >> b[i];
    }
    
    if ((*min_element(a.begin(),a.end())) < k) {
        cout << "Impossible";
        return;
    }
    
    sort(b.begin(),b.end(),greater<int>());
    ll sm = 0;
    for (int i = 0; i < m; i++)
    {
        sm += b[i];
    }
    set<int> sums;
    vector<int> cs;
    rec(b,sums,cs,k,m,0);
    ll ans = 0;
    for (int i = 0; i < n; i++)
    {
        bool ok = false;
        for (int j = a[i]; j <= sm; j++)
        {
            if (sums.find(j) != sums.end()) {
                ans += j-a[i];
                ok = true;
                break;
            }
        }
        if (!ok) {
            cout << "Impossible\n";
            return;
        }
    }
    
    cout << ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie();
    int t = 1;
    // cin >> t;
    
    while (t--)
    {
        solve();
    }
    return 0;
}

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