Submission #444803

#	Time	Username	Problem	Language	Result	Execution time	Memory
444803		zxcvbnm	Kitchen (BOI19_kitchen)	C++14	100 / 100	81 ms	1056 KiB

kitchen

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e9 + 5;
const int maxN = 305;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m, k;
    cin >> n >> m >> k;
    vector<int> a(n), b(m);
    for(int& i : a) {
        cin >> i;
    }
    for(int& i : b) {
        cin >> i;
    }

    int ans = INF;
    for(int i : a) {
        if (i < k) {
            cout << "Impossible\n";
            exit(0);
        }
    }

    int time = accumulate(a.begin(), a.end(), 0);

    vector<int> last(maxN*maxN, -INF);
    last[0] = 0;
    vector<int> curr(maxN*maxN, -INF);
    for(int i = 1; i <= m; i++) {
        for(int j = 0; j < maxN*maxN; j++) {
            curr[j] = last[j];
            if (j-b[i-1] < 0) continue;

            curr[j] = max(curr[j], last[j-b[i-1]] + min(n, b[i-1]));
            if (curr[j] >= k*n && j >= time && j-time < ans) {
                ans = j-time;
            }
        }
        last = curr;
    }

    if (ans == INF) {
        cout << "Impossible\n";
    } else {
        cout << ans << "\n";
    }
    return 0;
}

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