Submission #938764

#	Time	Username	Problem	Language	Result	Execution time	Memory
938764		vjudge1	Kitchen (BOI19_kitchen)	C++17	51 / 100	76 ms	3472 KiB

kitchen

#include <bits/stdc++.h>
#define int long long
#define M 302
 
using namespace std;
 
int n, m, k, A = 0, B = 0, res = -1;
bool flag = false;
vector<int> a, b;
vector<vector<bool>> dp;
 
signed main() {
    cin >> n >> m >> k;
    a = vector<int>(n), b = vector<int>(m);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
        A += a[i];
        if(a[i] < k) flag = true;
    }
    for(int i = 0; i < m; i++) {
        cin >> b[i];
        B += b[i];
    }
    if(k > 1 || m <= 15) {
       // try every subset
    vector<int> diff;
    bitset<M> bin;
    int sus, sum;
    bool check;
    for(int i = 0; i < (1 << m); i++) {
        sum = 0, sus = 0;
        for(int j = 0; j < m; j++) {
            if(i & (1 << j)) {
                sum += b[j];
                sus += min(n, b[j]);
            }
        }
        if(sum >= A && sus >= n * k) {
            if(res == -1) res = sum - A;
            else res = min(res, sum - A);
        }
    }
    if(flag || res == -1) cout << "Impossible\n";
    else cout << res << "\n";
    } else {
    dp = vector<vector<bool>>(m + 1, vector<bool>(B + 1, false));
    dp[0][0] = true;
    for(int i = 1; i <= m; i++) {
        for(int j = 0; j <= B; j++) {
            if(j >= b[i - 1]) dp[i][j] = dp[i - 1][j] | dp[i - 1][j - b[i - 1]];
            //cout << dp[i][j] << " ";
        }
        //cout << "\n";
    }
    //
    int res = LLONG_MAX;
    for(int i = 0; i <= m; i++) {
        for(int j = A; j <= B; j++) {
            if(dp[i][j]) res = min(res, j - A);
        }
    }
    if(res == LLONG_MAX) cout << "Impossible\n";
    else cout << res << "\n";}
}

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:29:10: warning: unused variable 'check' [-Wunused-variable]
   29 |     bool check;
      |          ^~~~~

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