Submission #1099422

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099422		vjudge1	Kitchen (BOI19_kitchen)	C++17	100 / 100	21 ms	1884 KiB

kitchen

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define fileio(name) if (fopen(name".inp", "r")) freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout)

const int maxn = 301, inf = 1e18;
int n, m, k, a[maxn], b[maxn], f[2][maxn*maxn];

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    fileio("");
    // freopen("debug.txt", "w", stderr);

    cin >> n >> m >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        if (a[i] < k) {
            cout << "Impossible";
            return 0;
        }
    }
    for (int i = 1; i <= m; i++) {
        cin >> b[i];
    }

    for (int i = 1; i <= 300*300; i++) {
        f[0][i] = -inf;
    }
    for (int i = 1; i <= m; i++) {
        for (int j = 0; j <= 300*300; j++) {
            f[i%2][j] = f[(i-1)%2][j];
            if (j >= b[i]) {
                f[i%2][j] = max(f[i%2][j], f[(i-1)%2][j - b[i]] + min(n, b[i]));
            }
        }
    }

    int res = inf, sum = accumulate(a+1, a+1+n, 0LL);
    for (int i = sum; i <= 300*300; i++) {
        if (f[m%2][i] >= n*k) {
            res = i;
            break;
        }
    }

    if (res < inf) {
        cout << res - sum;
    } else {
        cout << "Impossible";
    }

    return 0 ^ 0;
}

Compilation message (stderr)

kitchen.cpp: In function 'int32_t main()':
kitchen.cpp:5:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define fileio(name) if (fopen(name".inp", "r")) freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout)
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:13:5: note: in expansion of macro 'fileio'
   13 |     fileio("");
      |     ^~~~~~
kitchen.cpp:5:90: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define fileio(name) if (fopen(name".inp", "r")) freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout)
      |                                                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:13:5: note: in expansion of macro 'fileio'
   13 |     fileio("");
      |     ^~~~~~

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