Submission #1105774

#	Time	Username	Problem	Language	Result	Execution time	Memory
1105774		vjudge1	Kitchen (BOI19_kitchen)	C++17	29 / 100	66 ms	3580 KiB

kitchen

#include <bits/stdc++.h>

int main() {
    std::ios_base::sync_with_stdio(false); 
    std::cin.tie(nullptr);

    int n, m, k;
    std::cin >> n >> m >> k;
    std::vector<int> a(n), b(m);
    for (int i = 0; i < n; i++) {
        std::cin >> a[i];
    }
    for (int i = 0; i < m; i++) {
        std::cin >> b[i];
    }
    int64_t suma = 0;
    for (int i = 0; i < n; i++) {
        suma += a[i];
    }
    int64_t sumb = 0;
    for (int i = 0; i < m; i++) {
        sumb += b[i];
    }
    if (k == 1) {
        std::vector<std::vector<bool>> dp(m + 1, std::vector<bool>(sumb + 1, false));
        dp[0][0] = 1;
        for (int i = 1; i <= m; i++) {
            for (int j = 0; j <= sumb; j++) {
                dp[i][j] = max(dp[i][j], dp[i - 1][j]);
                if (j >= b[i - 1]) {
                    dp[i][j] = max(dp[i][j], dp[i - 1][j - b[i - 1]]);
                }
            }
        }
        for (int j = suma; j <= sumb; j++) {
            if (dp[m][j] == 1) {
                std::cout << j - suma << "\n";
                return 0;
            }
        }
        std::cout << "Impossible\n";
        return 0;
    }
    for (int i = 0; i < n; i++) {
        if (a[i] < k) {
            std::cout << "Impossible\n";
            return 0;
        }
    }
    int64_t ans = LLONG_MAX;
    for (int mask = 0; mask < (1 << m); mask++) {
        std::vector<int> chefs;
        int64_t sum = 0;
        for (int i = 0; i < m; ++i) {
            if (mask & (1 << i)) {
                chefs.push_back(b[i]);
                sum += b[i];
            }
        }
        if (sum < suma) {
            continue;
        }
        std::sort(chefs.begin(), chefs.end());
        std::vector<int> towers(n), mars(n);
        int ptr = 0;
        int delta = 0;
        for (auto x : chefs) {
            mars[ptr]++;
            if (ptr + x < n) {
                mars[ptr + x]--;
            }
            while (ptr < n && delta + mars[ptr] == k) {
                delta += mars[ptr++];
            }
            if (ptr == n) {
                continue;
            }
        }
        if (ptr == n) {
            ans = std::min(ans, sum - suma);
        }
    }
    if (ans != LLONG_MAX) {
        std::cout << ans << "\n";
        return 0;
    }
    std::cout << "Impossible\n";
    return 0;
}

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