Submission #747738

#	Time	Username	Problem	Language	Result	Execution time	Memory
747738		nguyentunglam	Kitchen (BOI19_kitchen)	C++17	100 / 100	36 ms	1308 KiB

kitchen

#include<bits/stdc++.h>
#define fi first
#define se second
#define endl "\n"
#define ii pair<int, int>
using namespace std;
const int N = 310, M = 300 * 300;
vector<int> lst[2];
int f[M + 10], g[M + 10], h[M + 10];
int main() {
    #define task ""
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen ("task.inp", "r")) {
        freopen ("task.inp", "r", stdin);
        freopen ("task.out", "w", stdout);
    }
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int n, m, k; cin >> n >> m >> k;
    int sum = 0, ans = 1e9;
    for(int i = 1; i <= n; i++) {
        int x; cin >> x;
        if (x < k) return cout << "Impossible", 0;
        sum += x;
    }
    for(int i = 1; i <= m; i++) {
        int x; cin >> x;
        if (x <= n) lst[0].push_back(x);
        else lst[1].push_back(x);
    }
    f[0] = 1;
    for(int &val : lst[0]) for(int j = M; j >= val; j--) if (f[j - val]) f[j] = 1;
    h[M + 1] = 1e9;
    for(int j = M; j >= 0; j--) {
        h[j] = f[j] ? j : h[j + 1];
        g[j] = -1e9;
    }
    g[0] = 0;
    for(int &val : lst[1]) for(int j = M; j >= val; j--) g[j] = max(g[j], g[j - val] + 1);
    for(int j = 0; j <= M; j++) if (g[j] >= 0) {
        int tmp = max(n * k - g[j] * n, sum - j);
        tmp = max(tmp, 0);
        if (tmp > M) continue;
        int i = h[tmp];
        ans = min(ans, j + i - sum);
    }
    if (ans > 1e8) return cout << "Impossible", 0;
    cout << ans;
}

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:14:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen ("task.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:15:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen ("task.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:18:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kitchen.cpp:19:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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